Compression therapy uses fitted garments to apply graduated pressure that helps move blood and fluid back toward the heart, reducing swelling and managing venous conditions.
For the full breakdown, see our best Compression Stockings for Lymphedema guide.
If your legs feel heavy, swell by evening, or a doctor has mentioned venous insufficiency, you’ve likely heard the term. Compression therapy is a straightforward treatment: wearing specially fitted stockings, wraps, or bandages that squeeze your legs. The pressure is highest at the ankle and gradually decreases upward, helping your veins and lymphatic system push fluid back toward the heart instead of letting it pool in your lower legs. Clinicians consider it first-line care for several vascular conditions, and it also works for people who simply spend long hours on their feet.
What Conditions Does Compression Therapy Treat?
Compression therapy is standard treatment for chronic venous insufficiency, edema, venous leg ulcers, lymphedema, varicose veins, and post-thrombotic syndrome. Multiple clinical guidance sources characterize it as gold-standard, first-line care for venous insufficiency and venous leg ulcer management. Beyond clinical conditions, people with jobs requiring long periods of standing or sitting use it to prevent leg fatigue and swelling. The underlying mechanism is simple physics: external pressure supports vein walls, improves one-way valve function, and reduces space for fluid to accumulate—resulting in less swelling, better circulation, and improved healing.
How Do You Wear Compression Garments Correctly?
Proper application determines whether the garment helps or hurts. Clinical guidance is consistent: put the garment on first thing in the morning before swelling builds, and wear it through the day. Remove it at night unless your clinician advises otherwise.
The standard technique for stockings:
- Turn the stocking inside out, leaving only the foot portion right-side out.
- Place your foot into the stocking and carefully fit the heel into its designated pocket.
- Pull the fabric up your leg in smooth sections, working out any wrinkles as you go.
- Smooth the garment fully so the top band sits flat without rolling or folding over.
Wrinkles and folded bands concentrate pressure in a small area, which is uncomfortable and can reduce effectiveness. The garment should feel snug but not painful. Check during the day that it is not slipping down, bunching up, or leaving deep indentations. Altering the structure changes the pressure profile and can create a dangerous tourniquet effect. If the fit is wrong, get a different size.
Watch for warning signs requiring immediate action: new pain, numbness, pins and needles, toe color changes, or coldness. Remove the garment and contact your clinician.
What Are the Different Compression Levels?
Compression garments come in pressure levels measured in millimeters of mercury (mmHg), describing how much pressure the garment exerts on your leg. Clinical guidance typically classifies levels this way: mild compression sits below 20 mmHg; moderate runs 20–40 mmHg; strong covers 40–60 mmHg; and very strong exceeds 60 mmHg.
The right level depends entirely on your condition and severity. Over-the-counter “support” socks generally provide mild compression under 20 mmHg for minor leg fatigue or travel. Prescription-strength stockings in moderate and strong ranges treat actual venous disease under a clinician’s direction. Choosing the strongest option without medical advice is risky—higher pressure is not automatically better and can be harmful.
Who Should Not Use Compression Therapy?
Compression therapy is safe for most people but carries real contraindications. Severe peripheral arterial disease (PAD) is the most significant—if leg arteries are narrowed or blocked, external pressure can reduce blood flow enough to cause tissue damage. Decompensated heart failure is another recognized contraindication, since extra fluid pushed from the legs can overwhelm a struggling heart. Clinical guidance recommends a vascular assessment before starting higher compression when arterial disease is possible.
Additional cautions include untreated deep vein thrombosis, untreated infection, ischemic pain, and severe neuropathy where you cannot feel if the garment is too tight. If you have any of these, do not begin compression therapy without a clinician’s evaluation.
FAQs
How Long Should I Wear Compression Socks Each Day?
Guidance generally recommends wearing compression garments throughout the day after putting them on in the morning, then removing them at night. The garment works against swelling that builds during waking hours. Your doctor may adjust this schedule based on your specific condition, so follow their instruction if it differs.
Can I Sleep With Compression Socks On?
Most people should remove compression garments at night unless a clinician specifically tells them to keep them on. Lying down reduces fluid pooling in the legs, so the pressure is usually unnecessary while you sleep. Some postsurgical or wound-care situations do require overnight wear, which is why clinician instruction takes priority.
Are Compression Stockings the Same as Support Socks?
Not quite. Support socks are typically over-the-counter products providing mild, uniform pressure under 20 mmHg. Compression stockings are medical-grade garments manufactured to deliver specific graduated pressure levels, often requiring a prescription. The key difference is the precise, measured compression and clinical oversight that comes with higher-pressure garments.
References & Sources
- Cleveland Clinic. “Compression Therapy.” Patient guidance on how the therapy works, conditions it treats, and compression levels.
- European Wound Management Association. “Compression Therapy Guidelines.” Consensus guidance on clinical best practices and pressure recommendations.
- College of Licensed Practical Nurses of Alberta. “Compression Therapy for Venous Insufficiency Guideline.” Evidence-based guideline covering application, contraindications, and vascular assessment.