Sickle cell disease affects approximately 15,000 people in the UK, making it one of the most common serious genetic conditions. Yet day-to-day management of its circulatory complications, particularly lower limb ulcers (affecting 25-75% of adults) and chronic swelling, receives little attention outside specialist haematology services.

Compression socks are used in sickle cell disease, but the guidance around them has to account for a physiology that standard compression protocols were not designed around. The altered red blood cell shape, the tendency toward vascular occlusion, the impaired microcirculation, and the skin fragility that develops in long-standing disease all affect what compression can safely achieve and how it should be applied. Done correctly and with the right clinical involvement, graduated compression can support venous return, reduce lower limb oedema, and form part of a structured approach to managing the leg complications that significantly reduce quality of life for adults with sickle cell disease. Done incorrectly, it introduces risks that a condition already characterised by vascular fragility does not need.

This article explains how sickle cell disease affects lower limb circulation, where compression socks fit into the management picture, what level of compression is appropriate, which garment features matter specifically for sickle cell, and why haematology or specialist involvement is the necessary foundation for any compression programme in this population. By the end, you will have a clear and honest understanding of what compression can contribute to lower limb health in sickle cell disease and how to approach it safely.

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How Does Sickle Cell Disease Affect Lower Limb Circulation?

Sickle cell disease is a group of inherited haemoglobin disorders in which red blood cells contain abnormal haemoglobin S, which causes the cells to adopt a rigid, sickle-shaped form under conditions of low oxygen, dehydration, cold, or physiological stress. These sickled cells do not flow through blood vessels as efficiently as normal biconcave red cells. They are less deformable, more adhesive to the vessel wall, and more prone to aggregating in the smaller blood vessels of the microcirculation. The resulting vaso-occlusion, the blockage of small vessels by sickled cells and the inflammatory response they trigger, is the central mechanism behind the tissue damage that sickle cell disease causes across multiple organ systems.

In the lower limbs, this vaso-occlusive process has cumulative consequences over years of disease. The chronic haemolysis that characterises sickle cell disease, the continuous destruction of sickled red cells, reduces circulating haemoglobin and delivers a steady stream of free haem into the vascular system, which damages the endothelial lining of blood vessels and promotes inflammation. The result is a progressive impairment of the microvasculature in the lower legs that impairs both arterial delivery of oxygen and venous return of deoxygenated blood, creating the circulatory environment in which lower limb complications develop.

Why Leg Ulcers Are So Common in Sickle Cell Disease?

Leg ulcers in sickle cell disease develop through the convergence of several disease-specific mechanisms that do not all apply in venous leg ulcers from other causes. Chronic venous hypertension from impaired venous return is present, as in standard venous ulceration, but in sickle cell disease, it is compounded by the microvascular damage that reduces tissue perfusion, the chronic anaemia that reduces oxygen delivery to already-compromised tissue, and the skin fragility that results from years of impaired microcirculation in the overlying dermis.

Research published in the British Journal of Haematology found leg ulcers in sickle cell disease associated with higher haemolysis markers, lower haemoglobin, and greater vascular dysfunction, confirming ulceration reflects systemic vascular burden rather than localised skin issues. Ulcers most commonly appear over the medial/lateral malleoli and resist healing due to chronic tissue underperfusion.

Lower Limb Oedema and Chronic Venous Insufficiency

Beyond ulceration, lower limb oedema and chronic venous insufficiency are common complications in sickle cell disease that develop from the same underlying vascular pathology. Repeated vaso-occlusive episodes in the small vessels of the lower leg damage the venous endothelium and impair the function of venous valves, producing a pattern of chronic venous hypertension that is similar in its mechanical consequences to post-thrombotic syndrome but arises through a different pathological process. The result is persistent lower leg swelling, skin discolouration, and the progressive lipodermatosclerosis that characterises advanced chronic venous disease in this population.

Studies estimate that people with sickle cell disease have a 3-4 times higher risk of venous thromboembolism than the general population, driven by haemolysis-induced hypercoagulability, endothelial damage, and painful crisis immobility. Post-thrombotic venous damage further compounds existing circulatory compromise.

Where Do Compression Socks Fit in Sickle Cell Lower Limb Management?

Compression socks address the venous component of lower limb complications in sickle cell disease by applying graduated external pressure that supports venous return, reduces the venous hypertension that drives oedema and ulceration, and limits the daily fluid accumulation that worsens lower limb symptoms. They do not address the haematological mechanisms of the disease, the chronic haemolysis, the vaso-occlusive tendency, or the impaired microvascular perfusion that underpins the tissue damage.

Their role is specific:

Managing the venous consequences of a disease whose primary pathology operates at a different level.

This specificity matters for setting realistic expectations. Compression socks in sickle cell disease are not a treatment for the disease itself. They are a component of lower limb management that, when used correctly and as part of a specialist-directed approach, can reduce oedema, support venous ulcer healing alongside other wound care interventions, lower the recurrence risk of healed ulcers, and improve daily lower limb function in people living with chronic venous complications of sickle cell disease.

Compression in Active Leg Ulcer Management

For active leg ulcers in sickle cell disease, compression is used as part of a specialist-directed wound care approach rather than as an independent intervention. The evidence for compression in venous leg ulcer healing applies to sickle cell ulcers, but the unique vascular environment of sickle cell disease means that standard high-compression bandaging systems, which typically apply 40 mmHg or more at the ankle in a four-layer system, are not always well tolerated in a population with impaired arterial microcirculation and fragile wound margins. Reduced compression systems and specialist assessment of arterial adequacy are therefore standard components of ulcer management in sickle cell disease rather than optional additions.

The key clinical principle is that compression for active sickle cell leg ulcers must be directed by a specialist team, either a haematologist, a wound care specialist, or ideally both working together. Self-managing compression on an active sickle cell ulcer without specialist oversight introduces risks of delayed healing, wound deterioration, and localised arterial compromise that are avoided when the compression approach is matched to the specific characteristics of the wound and the individual's vascular status.

Compression for Oedema and Ulcer Prevention

The clearest role for independently managed compression socks in sickle cell disease is in the maintenance phase: managing chronic lower limb oedema, reducing venous hypertension in limbs with established chronic venous insufficiency, and preventing the recurrence of healed leg ulcers. In this context, graduated compression socks at 20 to 30 mmHg, worn consistently from morning to evening, reduce the daily fluid accumulation that worsens venous disease and provide the ongoing venous support that a damaged venous system in a sickle cell patient cannot generate internally.

Preventive compression use in sickle cell disease, worn during activities that increase venous stasis, such as long-haul travel, prolonged standing, or hot weather, also addresses the elevated DVT risk that the disease's hypercoagulable state creates. For people with sickle cell disease travelling long distances, compression socks combined with adequate hydration and regular movement are a practical and evidence-supported component of VTE prophylaxis in a population where clot risk is meaningfully higher than average.

What is the Safety Assessment That Must Come Before Compression in Sickle Cell Disease?

The most important principle in compression use for sickle cell disease is this: the disease's vascular environment makes clinical assessment more necessary, not less, than it is for standard venous compression indications. Sickle cell disease progressively damages the microvasculature and the larger vessels of the lower leg through repeated vaso-occlusion and chronic haemolysis-driven endothelial injury. This means the arterial blood flow to the lower limb cannot be assumed to be adequate simply because the person is young or the venous indication for compression is clear.

An ankle-brachial pressure index, or ABPI, assessment is essential before graduated compression above 15 mmHg is introduced in anyone with sickle cell disease who has lower limb complications, and particularly before any compression approach is applied to a limb with active or recently healed ulceration. An ABPI below 0.8 indicates arterial compromise that contraindicates standard therapeutic compression. An ABPI below 0.5 contraindicates all compression until the arterial situation has been assessed and managed. For people with sickle cell disease and leg complications, this assessment should be arranged through the haematology team or specialist vascular service managing their care rather than through a general GP appointment, because interpretation in the context of sickle cell vascular disease requires familiarity with the specific pathology involved.

Haematology Involvement as the Foundation

Compression for sickle cell lower limb complications should not be a decision made independently. The haematology team managing a person's sickle cell disease is the appropriate first point of contact for any compression programme, both because they understand the individual's disease severity, current haemoglobin level, transfusion status, and vascular history, and because they can coordinate with wound care, vascular, and podiatry services where needed. Starting compression socks for sickle cell lower limb management without informing the haematology team is not a safe or complete approach.

For people without established haematology follow-up who are using compression for general venous support rather than active ulcer management, a GP review that includes ABPI assessment and confirmation of adequate arterial circulation is the appropriate step before starting above 15 mmHg. This is not a bureaucratic barrier to accessing compression support. It is the clinical check that makes compression safe in a condition where the vascular environment is not predictable without assessment.

Compression Levels for Sickle Cell Disease

Compression socks for sickle cell lower limb complications are rated in millimetres of mercury, or mmHg, measuring the pressure applied at the ankle. The correct level depends on the clinical purpose, whether that is general oedema management, preventive venous support, maintenance following healed ulceration, or part of an active ulcer care plan, and on the confirmed arterial blood flow status of the individual limb. The graduated nature of the compression, highest at the ankle and reducing progressively toward the knee, is what makes it therapeutically effective rather than simply constrictive, and verification of that gradient is part of what makes MHRA-registered medical-grade compression appropriate for clinical use.

Compression selection in sickle cell disease requires particular attention to the lower end of the therapeutic range. The impaired microvascular perfusion that characterises the disease means that the safety margin between therapeutic benefit and tissue compromise at the compression zone is narrower than it is in standard venous compression indications, and erring toward lower effective levels with confirmed arterial adequacy is preferable to applying higher levels on the assumption that more compression is always better.

15 to 20 mmHg: Preventive and Supportive Compression

Mild compression in the 15 to 20 mmHg range is appropriate for people with sickle cell disease who want circulatory support during high-risk periods such as long-haul travel, prolonged standing, or hot weather, and for those with mild lower limb oedema in the absence of active ulceration or significant venous disease. At this level, the graduated pressure provides meaningful venous support without creating significant additional arterial risk in a limb with confirmed adequate perfusion. It is also the appropriate level for considering compression socks during pregnancy in women with sickle cell disease, where the combination of disease-related hypercoagulability and the additional thrombotic risk of pregnancy warrants DVT prophylaxis under obstetric and haematology guidance.

20 to 30 mmHg: Daily Maintenance for Chronic Venous Complications

This is the most commonly used compression level for managing chronic venous insufficiency, persistent oedema, and post-ulcer maintenance that characterise lower limb complications in sickle cell disease in the stable, non-ulcerated phase. It provides sufficient graduated pressure to reduce venous hypertension in a damaged venous system, control daily fluid accumulation in the lower leg, and support the venous return that the disease has progressively compromised. Main Squeeze Compression Socks at 20 to 30 mmHg carry MHRA registration as medical-grade compression garments, confirming they deliver a verified graduated compression gradient meeting the clinical standards required for therapeutic use at this level. For people with sickle cell disease whose haematology team has confirmed adequate arterial circulation and recommended daily compression for venous insufficiency management, this level provides the most practical and consistently beneficial daily support.

Compression for Active Ulcers: A Clinical Decision, Not a Product Choice

For people with active sickle cell leg ulcers, the compression level is determined by a specialist wound care assessment rather than by general guidance. Standard four-layer high-compression bandaging systems applying 40 mmHg or more are used in venous ulcer management in the general population, but are often modified or reduced for sickle cell ulcers where microvascular compromise is present. Reduced-compression systems, short-stretch bandaging, or specialist-prescribed hosiery at levels calibrated to the individual limb's arterial status are the approaches used in specialist practice. This is a managed clinical decision, not a self-selected product choice.

Compression Levels for Sickle Cell at a Glance

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Garment Style Selection for Sickle Cell Lower Limb Complications

Selecting the appropriate compression sock style for sickle cell lower limb complications requires consideration of where venous disease and ulceration are most concentrated, the specific skin fragility challenges that sickle cell disease creates, and the practical requirements of daily wear in a condition where skin integrity is already compromised in the lower leg.

Knee-high graduated compression socks are the most appropriate starting style for the majority of people with sickle cell disease, managing chronic lower limb oedema and venous insufficiency in the stable phase. They cover the ankle and lower calf, where venous pooling and fluid accumulation are most pronounced and where the medial and lateral malleolar ulceration that characterises sickle cell leg disease is most commonly located. They are also the most practical style for consistent daily wear, which is the key determinant of long-term benefit in chronic venous management.

Avoiding Constriction at the Wound Margin

For people with healed but recently active ulceration, or with areas of lipodermatosclerotic or fragile skin in the lower leg, garment selection must account for the risk of the top band or any seam creating localised pressure against already-compromised skin. A top band that constricts above a recently healed wound margin, or a seam that crosses a zone of lipodermatosclerosis, can trigger skin breakdown at a site that is susceptible to injury in a way that the same pressure would not cause on healthy skin. Choosing a garment with a soft, non-binding top band and flat seam construction throughout the lower leg compression zone reduces this risk in a population where skin integrity is a persistent management concern.

Thigh-High Stockings and Bilateral Considerations

Sickle cell disease can produce venous complications bilaterally, and the decision about whether to apply compression to one or both legs should be based on clinical assessment of each limb's venous and arterial status rather than treating both sides identically. Thigh-high stockings become relevant when venous insufficiency extends into the thigh or when DVT-related post-thrombotic changes involve the femoral vein above the knee. For most people with sickle cell lower limb complications where disease is concentrated in the ankle and lower calf, knee-high socks address the primary venous territory without the additional complexity of a longer garment.

How to Measure for Compression Socks with Sickle Cell Disease?

Accurate measurement is the foundation of safe and effective compression for sickle cell lower limb complications, and several features of the condition affect how measurement should be approached. Oedema in sickle cell lower limb disease can fluctuate significantly, particularly around painful episodes, periods of increased disease activity, and changes in ambient temperature. Measuring at the correct time of day and under the right conditions produces a sizing that reflects the stable maintenance phase rather than either the acute peak of swelling or the post-crisis reduction.

Measure first thing in the morning, before standing for any extended period, when overnight elevation has allowed fluid accumulation to reduce to close to baseline. If swelling is currently elevated due to a recent painful episode or increased disease activity, wait until the acute period has settled before measuring for a new compression garment, as sizing to an acutely swollen limb will produce a sock that is too large once the acute phase resolves. Any area of active ulceration must be assessed by the wound care team before compression is applied, and sizing in the context of an actively ulcerated limb is part of that clinical assessment rather than a self-managed process.

Step-by-Step Measurement Guide for Sickle Cell

• Inspect both legs before measuring for any areas of redness, skin breakdown, wound margins, or skin changes that require clinical attention

• Measure before getting out of bed, or within the first ten minutes of the morning, before extended standing

• Use a flexible fabric tape measure; shoe size bears no reliable relationship to compression sock sizing

• Measure the ankle circumference at the narrowest point, just above the ankle bone

• Measure the calf at its widest point, typically at the mid-calf

• For thigh-high garments, measure the thigh at its widest point and the floor-to-gluteal-fold length

• Compare measurements against the specific size chart for the product being purchased

• If measurements fall between two sizes, the smaller size provides firmer compression, and the larger provides easier daily application

• If a limb has recently healed ulceration over a bony prominence, discuss the measurement and fitting approach with your wound care team before applying any garment independently

Main Squeeze Compression Socks are available in a wide-calf option for people whose lower leg circumference falls above the standard sizing range, which is relevant for anyone with chronic sickle cell oedema that has substantially enlarged the lower leg over time. A garment too narrow at the calf creates a constriction at the top of the compression zone that impairs venous return rather than supporting it.

How to Apply Compression Socks with Sickle Cell Disease?

Application technique for sickle cell lower limb compression requires the same careful section-by-section approach recommended for any therapeutic compression use, with specific attention to the condition of the skin in the lower leg and ankle zone. Sickle cell disease causes progressive fragility in the skin and subcutaneous tissue of the lower leg, and the application errors that produce manageable discomfort in healthy legs can cause skin damage in a limb where skin integrity is already reduced.

Turn the sock inside out from the top down to the heel. Position the foot section over the foot with the heel cup sitting directly over the heel. Roll the sock upward in small increments, smoothing the fabric completely flat against the skin at each stage. Pay particular attention to the ankle zone over the medial and lateral malleoli, which are the sites most commonly affected by sickle cell ulceration and where skin is most fragile. Ensure the compression zone is wrinkle-free across the entire surface before leaving the sock in place for the day. After full application, inspect any areas of previously ulcerated or currently fragile skin through the sock if possible, and plan to remove and check these areas during the day if the skin is particularly vulnerable.

Applying Compression Around Wound Dressings

For people wearing compression over a wound dressing on a healing or recently healed sickle cell ulcer, the application requires additional care to ensure the dressing does not shift, fold, or create a pressure ridge beneath the compression sock. The wound care team managing the ulcer will advise on the appropriate dressing type, compression level, and application technique for the specific wound stage. Follow the team's guidance on this precisely, as the interplay between wound dressing, compression level, and limb perfusion in sickle cell ulcer management is a specialist clinical judgement rather than a general compression principle.

When to Remove the Compression Sock During Wear

Remove the compression sock immediately if any of the following are noticed during wear: significant pain in the lower leg or foot that is not related to the usual pattern of the individual's sickle cell disease; increasing warmth, redness, or swelling in the lower leg compared to the start of the day; discolouration of the toes including blueness, whiteness, or darkening; or any visible wound deterioration visible around the wound margins beneath the sock. In the context of sickle cell disease, where vascular status can change rapidly during an acute episode, these signs warrant immediate removal and clinical assessment rather than a wait-and-see response.

When and How Long to Wear Compression Socks for Sickle Cell?

Apply compression socks first thing in the morning, before rising from bed, when the lower legs are at their least swollen, and the graduated pressure gradient of the sock can work from the outset of the day. This timing is particularly important in sickle cell lower limb management because the combination of gravity and the disease's impaired venous return allows fluid to accumulate quickly once the person is upright, and containing that accumulation from the morning is more effective than compressing a leg that has already begun to swell.

For chronic venous insufficiency and oedema management in the stable phase, wearing compression throughout the waking day and removing it before bed is the standard approach. The horizontal position during sleep reduces the hydrostatic pressure that drives venous accumulation during upright hours, and overnight compression is not part of standard maintenance management for stable lower limb venous disease. Where a specialist has directed overnight compression as part of an active ulcer management plan, that advice reflects a specific clinical judgement and should be followed accordingly.

High-Risk Periods Requiring Consistent Compression Use

Several situations increase the vascular demand on already-compromised sickle cell lower limb circulation and make consistent daily compression use particularly important.

• Long-haul travel by air or road, where immobility and dehydration both increase DVT risk in a population with elevated baseline thrombotic tendency

• Hot weather, which causes peripheral vasodilation and increases the fluid accumulation that a damaged venous system cannot manage efficiently

• Periods of reduced activity from illness, painful crisis recovery, or hospitalisation, during which calf muscle pump function is further reduced

• Pregnancy, where the combination of sickle cell hypercoagulability and the additional thrombotic risk of pregnancy significantly elevates DVT risk under obstetric and haematology guidance

• Any period of increased physiological stress, including infection or dehydration, which increases the sickling tendency and raises the risk of lower limb vascular complications

Caring for Compression Socks in Sickle Cell Disease

Compression socks for sickle cell lower limb management are worn daily over the long term, and the elastic fibres that generate compression degrade through washing and wearing. A garment that has lost its elasticity no longer delivers its rated mmHg at the ankle, which, for someone managing chronic venous insufficiency in a sickle cell limb, means progressive under-treatment that may allow venous disease to worsen without an obvious external cause.

Wash compression socks in cool water on a gentle cycle or by hand using a mild detergent without fabric softener. Fabric softener deposits a coating on elastic fibres that reduces their contractile capacity with each wash, progressively diminishing the compression the garment delivers. Do not tumble dry. Air dry away from direct heat, reshaping after washing to maintain the compression zone's form. Replace compression socks every three to six months with daily use. The morning ankle test applies here: if you can gather loose fabric at the ankle after correct application, the compression has degraded below its therapeutic threshold.

What to Look for in a Compression Sock for Sickle Cell Disease?

The features that make a compression sock appropriate for sickle cell lower limb management reflect both the general requirements of therapeutic compression and the specific vulnerabilities that sickle cell disease creates in the skin and vasculature of the lower leg.

The performance foundation must be verified: a genuine graduated compression gradient from ankle to knee, confirmed through independent assessment rather than estimated from a label. For a condition where under-delivery of the rated compression may allow chronic venous disease to progress, and where over-delivery of pressure on a compromised arterial microcirculation can cause tissue damage, accuracy in the delivered compression gradient is not a minor specification detail.

MHRA Registration for Medical-Grade Compression

MHRA registration confirms that a compression garment meets the clinical standards required to make medical-grade claims in the UK. For sickle cell lower limb management, this means the ankle pressure has been verified, the graduated gradient has been independently measured, and the garment is produced to the manufacturing consistency required for reliable therapeutic performance. Main Squeeze Compression Socks carry MHRA registration as medical-grade compression products, which is the appropriate standard for a condition requiring consistent, verifiable compression delivery over the long term.

Skin-Friendly Construction for Fragile Sickle Cell Skin

The progressive skin fragility of sickle cell lower limb disease makes garment construction details that are comfort preferences in standard compression use into clinical requirements. Flat seam construction throughout the lower leg compression zone eliminates the raised seam ridges that create localised pressure against fragile skin and wound margins. Smooth, soft materials rather than coarse synthetics reduce the surface friction against skin that may already have compromised integrity from previous ulceration. A non-binding top band that grips without constricting above the compression zone avoids creating a pressure ridge above an area of lipodermatosclerotic or post-ulcer skin where such pressure is more consequential than it would be on healthy tissue.

Breathability and Temperature Management

Sickle cell disease is aggravated by temperature extremes, and cold is a recognised trigger for vascular sickling events. A compression sock that traps cold and reduces skin temperature in the lower leg could theoretically contribute to vascular events in a person whose sickling tendency responds to cold, whilst a sock that retains excessive heat in warmer conditions may worsen fluid accumulation in a disease already characterised by impaired thermoregulation. Breathable materials that support temperature regulation rather than creating extremes in either direction are the appropriate choice for daily wear in sickle cell lower limb management.

A Clear Starting Point

Sickle cell disease is not a condition where compression socks can or should be selected and started without clinical involvement. The disease creates a vascular environment that requires specific assessment before any graduated external pressure is introduced, and the lower limb complications it produces, from ulcers to chronic venous insufficiency, deserve a management approach that is as carefully calibrated as the disease itself demands.

For people with sickle cell disease managing chronic lower limb oedema and venous insufficiency in the stable, non-ulcerated phase, and whose haematology or GP team has confirmed adequate arterial circulation via ABPI assessment, 20 to 30 mmHg graduated compression socks worn consistently from morning to evening represent an evidence-supported part of ongoing lower limb management. For prevention during travel, hot weather, or prolonged standing, 15 to 20 mmHg provides practical venous support with lower arterial risk.

Start by discussing compression with your haematology team or GP. Once arterial circulation has been confirmed and the appropriate compression level established, measure your ankle and calf first thing in the morning, apply using the section-by-section technique described above, and inspect your lower legs each evening for any skin changes. Main Squeeze Compression Socks are available in 15 to 20 mmHg and 20 to 30 mmHg with MHRA medical-grade registration, a wide-calf option for oedematous lower legs, flat seam construction throughout the compression zone, and breathable materials suited to the skin management demands of sickle cell lower limb care.

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Frequently Asked Questions

Can compression socks trigger a sickle cell crisis?

Correctly fitted, graduated compression socks used within the appropriate clinical parameters for a person with confirmed adequate arterial circulation do not trigger vascular occlusive episodes. The theoretical concern would be if compression caused significant venous stasis proximal to the garment or if it reduced arterial perfusion in a limb with already-compromised circulation. Both of these risks are addressed by correct sizing, ABPI assessment before starting therapeutic compression, and using a garment with a non-binding top band that does not create constriction above the compression zone. Clinical assessment before starting compression at 20 to 30 mmHg is the appropriate safeguard.

I have a sickle cell leg ulcer. Should I be using compression socks?

Active sickle cell leg ulcers require a specialist wound care assessment before any compression is applied to the affected limb. The compression level, type, and technique used for active ulcers in sickle cell disease are determined by the wound care team based on the wound characteristics and the individual's vascular status, and are not equivalent to the maintenance compression socks used for oedema and venous insufficiency in the stable phase. Contact your haematology team or GP to arrange a wound care referral if you have an active leg ulcer that has not been assessed by a specialist.

Can I wear compression socks on long-haul flights with sickle cell disease?

Yes, and there are strong clinical reasons to do so. People with sickle cell disease have a three to four times higher risk of DVT than the general population, and long-haul flights combine the immobility, relative dehydration, and reduced cabin pressure that increase venous stasis and clotting tendency. Graduated compression socks at 15 to 20 mmHg worn for the duration of the flight, combined with adequate hydration and regular movement, address the venous stasis component of this elevated risk. Before any long-haul travel, discuss your specific DVT prophylaxis needs with your haematology team, as your individual disease severity and haematological status may inform additional recommendations beyond compression alone.

Do both legs need compression in sickle cell disease?

This depends on the clinical picture of each limb individually. Sickle cell lower limb complications can affect both legs, one leg more than the other, or predominantly one leg. The decision about whether to apply compression bilaterally, and at what level, should be based on an assessment of each limb's venous and arterial status rather than applying the same approach to both sides by default. Discuss bilateral versus unilateral compression with your haematology team or GP based on your specific lower limb presentation.

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