Wear compression stockings for 2 to 6 weeks after knee replacement, depending on your surgeon's instructions and your individual recovery

Most surgeons recommend wearing compression stockings (also called surgical stockings or compression hose) for the first 2 to 6 weeks following knee replacement surgery. The exact timeline depends on your surgeon's protocol, the type of surgery you had, and how quickly your swelling decreases. Some patients need them longer if complications like blood clots develop; others may stop sooner if swelling resolves quickly. Your surgeon will give you a specific end date at your post-operative appointment, usually around 2 weeks after surgery.

Compression stockings work by squeezing your leg to push blood back toward your heart, which reduces swelling and lowers the risk of blood clots — a serious complication that can occur after major joint surgery. They are most critical in the first few weeks when swelling is worst and you are least mobile. Once you can walk normally, do stairs without pain, and swelling has mostly gone down, you can usually stop wearing them, even if your surgeon's original timeline suggested longer wear.

Key Takeaways

  • Compression stockings typically stay on for 2 to 6 weeks after knee replacement, with your surgeon setting the specific end date at your first post-op visit.
  • The main purpose is to prevent blood clots and reduce swelling during the period when you are least active and your leg is most vulnerable.
  • You may be able to stop wearing them early if swelling goes down and you return to normal walking and stair use without pain.
  • If you develop signs of blood clots — calf pain, warmth, redness, or sudden swelling in one leg — contact your surgeon when ready, regardless of whether you are still supposed to wear stockings.

Why surgeons prescribe compression stockings after knee replacement

After knee replacement, your leg swells because the surgery damages small blood vessels and triggers inflammation. Swelling peaks around day 3 to 5 and can last for weeks. Compression stockings squeeze the leg tissue, which pushes fluid back into the bloodstream and reduces the visible puffiness. More importantly, they keep blood flowing smoothly through your veins, which prevents clots from forming.

Blood clots are a real risk after knee replacement because you are immobile for days or weeks, your blood vessels have been irritated by surgery, and the tissue damage itself can trigger clotting. A clot in your calf (deep vein thrombosis, or DVT) can break loose and travel to your lungs, which is life-threatening. Compression stockings, combined with blood-thinning medication your surgeon prescribes, are your main defenses during the highest-risk period — the first 2 to 3 weeks.

What to expect during the weeks you wear them

Compression stockings come in different strengths, measured in millimeters of mercury (mmHg). After knee replacement, you will typically wear 15 to 20 mmHg stockings, which is mild to moderate compression — tight enough to work but not so tight that they cut off circulation. Your surgeon or hospital will provide them or tell you where to buy them. Some people receive them before surgery; others get them at the hospital after waking up.

Wear them during the day and often at night too, especially in the first 2 weeks. Take them off only to bathe or shower, unless your surgeon says otherwise. Your leg will feel warm and snug inside them, and they can be uncomfortable in hot weather. Many people find them itchy or feel claustrophobic, but this is normal. If they leave deep marks in your skin, feel painfully tight, or cause numbness or tingling, tell your surgeon — the fit may be wrong.

As swelling decreases and you become more active, wearing the stockings becomes less critical. By week 4 or 5, many people can switch to wearing them only during the day or only when they know they will be sitting for long periods. Your surgeon will tell you when you can stop entirely.

Signs you may need to wear them longer

If your swelling does not go down as expected, your surgeon may ask you to keep wearing compression stockings past the original 6-week mark. Excessive swelling can mean your leg is not draining properly, which increases clot risk. Similarly, if you develop signs of a blood clot — calf pain or tenderness, warmth or redness in one leg, sudden increase in swelling, or pain when you flex your foot — contact your surgeon when ready. You may need to wear stockings longer, take additional blood-thinning medication, or have an ultrasound to check for clots.

Some patients also need longer compression if they have a history of blood clots, are overweight, or had complications during surgery. Your surgeon will discuss this with you before you leave the hospital.

How to care for compression stockings

Wash your stockings by hand in lukewarm water with mild soap, then lay them flat to dry. Do not put them in the washing machine or dryer, as heat and agitation damage the elastic fibers that create the compression. Wash them every 1 to 2 days, or more often if you sweat heavily. Most pairs last through the entire recovery period if cared for properly.

If the elastic stretches out or the stockings no longer feel snug, they are no longer effective — compression only works if the fabric is tight. If this happens before your surgeon says you can stop wearing them, ask for a replacement pair.

Alternatives and when compression stockings alone are not enough

Compression stockings are one layer of clot prevention. Your surgeon will also prescribe blood-thinning medication — usually aspirin or an injectable anticoagulant like enoxaparin — for the first 1 to 2 weeks. Some surgeons use both; others use one or the other depending on your clot risk. Follow your surgeon's medication schedule exactly, even if you feel fine.

Moving your leg as soon as possible after surgery also prevents clots. Ankle pumps (flexing your foot up and down) can start the day of surgery. Walking, even short distances, becomes your best defense once you are cleared to bear weight. Staying hydrated and avoiding long periods of sitting also help. If you have risk factors for clots — previous clots, cancer, heart disease, or obesity — your surgeon may recommend longer compression or stronger blood-thinning medication.

Frequently Asked Questions

Can I take compression stockings off at night?

Most surgeons recommend wearing them day and night for the first 2 weeks, then you can usually remove them at night if swelling is down. Ask your surgeon at your post-op visit. If you develop calf pain or swelling at night, put them back on and call your surgeon.

What if compression stockings make my skin itchy or irritated?

Itching is common and usually fades as your skin adjusts. Wash the stockings daily and make sure your leg is dry before putting them on. If you develop a rash, blistering, or the itching is severe, tell your surgeon — you may need a different size or style, or your skin may need treatment.

Do I need compression stockings if I am not swelling much?

Yes. Swelling is not the only reason to wear them. They also prevent blood clots, which can happen without obvious swelling. Wear them for the full time your surgeon recommends, even if your leg looks normal.

Can I wear regular socks instead of compression stockings?

No. Regular socks do not provide the graduated compression needed to prevent clots and reduce swelling. Compression stockings are specifically designed for this purpose and are not optional during recovery.

What happens if I forget to wear them for a day?

One missed day in week 4 or 5 is unlikely to cause harm, but missing them in the first 2 weeks — when clot risk is highest — is riskier. If you forget, put them back on as soon as you remember. If you consistently forget or find them unbearable, talk to your surgeon about whether you can stop early or use an alternative like a sequential compression device (a machine that inflates around your leg).