Your surgeon will tell you when to remove the waterproof dressing, usually between 24 and 48 hours after surgery

The waterproof dressing covering your knee incision serves one job: keeping the surgical wound dry while it begins to seal. Most surgeons want this dressing to stay in place for a short window—typically one to two days—before you remove it yourself at home. The exact timing depends on how your particular surgery went and your surgeon's protocol, so the discharge paperwork you receive should have a specific date or day written on it.

Do not guess at this timing. If your paperwork does not say when to remove the dressing, call your surgeon's office before you do anything. Removing it too early risks infection; leaving it on too long can trap moisture and soften the skin around the incision. Your surgeon's instructions are the only reliable guide.

Key Takeaways

  • Your discharge paperwork will specify the exact day and time to remove the waterproof dressing—follow that instruction, not general timelines.
  • Most waterproof dressings stay on for 24 to 48 hours, but some surgeons prefer longer depending on the incision and your healing.
  • If you cannot find removal instructions in your paperwork, call your surgeon's office rather than removing it on your own schedule.
  • Once you remove the dressing, you will see the incision for the first time and should watch for signs of infection like increased redness, warmth, or drainage.
  • After removal, you may shower with the incision exposed if your surgeon approves, but do not soak the knee in a bath until cleared.

What happens under the waterproof dressing in the first 48 hours

The waterproof dressing is not keeping the wound closed—your surgeon's stitches or staples do that. The dressing is a barrier against bacteria and water. Underneath, your body is already laying down new tissue and sealing the incision from the inside out. The first 24 to 48 hours are when the risk of infection is highest because the wound is still raw and open to the surface.

Waterproof dressings are designed to let your skin breathe while blocking liquid from outside. They are not airtight; they are water-resistant. This means some moisture from your body can escape, but shower water or sweat cannot easily get in. Once your surgeon decides the incision has sealed enough on the surface, the dressing comes off and you can manage the wound differently.

How to remove the dressing safely at home

Wash your hands thoroughly with soap and water before you touch the dressing. Peel it back slowly and gently—if it sticks, you can dampen the edge with warm water to loosen the adhesive, but do not soak the incision itself. Some people find it easier to remove the dressing while standing in a warm shower, where the steam softens the adhesive.

Once the dressing is off, look at the incision. You will see stitches or staples running along the line of the cut. The skin around it may be swollen, red, or bruised—this is normal. Pat the area dry with a clean towel. Do not rub it. If there is any drainage on the dressing itself, that is also normal for the first day or two, but if it is heavy or foul-smelling, contact your surgeon.

Keep the old dressing and any packaging so you can show your surgeon at your follow-up visit if there are any questions about how the incision looked when you removed it.

Signs of infection to watch for after dressing removal

Once the waterproof dressing comes off, you will be able to see the incision clearly for the first time. This is when you should start watching for infection. Call your surgeon right away if you notice increased redness that spreads beyond the when ready incision line, warmth to the touch around the knee, swelling that gets worse rather than better, or drainage that is thick, yellow, green, or foul-smelling.

A small amount of clear or slightly pink drainage in the first day or two is normal. Mild redness and swelling are also expected. But fever, chills, or red streaks running up your leg are not normal and require when ready medical attention. Do not wait for a scheduled appointment if you see these signs.

Showering and bathing after the dressing comes off

Once the waterproof dressing is removed, you can usually shower with the incision exposed, but check your discharge paperwork first—some surgeons want you to wait a few more days or to cover the incision with a regular (non-waterproof) bandage during showers. If you are cleared to shower with the incision exposed, let warm water run over it gently. Do not scrub the incision or use soap directly on it.

Do not take a bath, soak in a hot tub, or submerge your knee in water until your surgeon says it is safe. This usually happens after the stitches or staples come out, which is typically 10 to 14 days after surgery. Soaking can soften the incision and introduce bacteria into the wound before it is fully sealed.

When stitches or staples come out

The waterproof dressing comes off in the first day or two, but the stitches or staples stay in place much longer. Your surgeon will remove them at a follow-up appointment, usually 10 to 14 days after surgery. Until then, keep the incision clean and dry, and do not pick at the stitches or staples.

After the stitches or staples are removed, you will have a small scar that will fade over months and years. At that point, you can usually bathe normally and resume other activities as your surgeon clears them. The incision will still be tender, so be gentle with it, but the risk of infection drops significantly once the stitches are out.

What to do if you lose or damage the waterproof dressing before removal day

If the dressing starts peeling up or comes off before your scheduled removal date, do not panic. Call your surgeon's office and describe what happened. They may tell you to leave it off, to cover it with a regular sterile bandage, or to come in for a replacement dressing. Do not try to reapply the waterproof dressing yourself—the adhesive will not work properly a second time.

If the incision gets wet before the dressing comes off, pat it dry when ready and call your surgeon's office. They will advise whether you need a new dressing or whether the exposure was brief enough that it does not matter. Most waterproof dressings can handle brief contact with water, but your surgeon knows your specific situation best.

Frequently Asked Questions

Can I shower while the waterproof dressing is still on?

Yes, that is the whole point of a waterproof dressing. You can shower normally while it is in place. Avoid very hot water and do not aim the shower directly at the dressing for long periods, but brief contact with water is fine. Pat the dressing dry afterward if water beads on it.

What if the dressing is still stuck tight and will not peel off?

Dampen the edges with warm water and let it sit for a minute or two to soften the adhesive. Peel slowly from one corner. If it is truly stuck, you can remove it in the shower where the steam helps. If you cannot get it off without causing pain or pulling at the incision, call your surgeon's office—they can remove it for you at an appointment.

Is it normal to see blood on the dressing when I remove it?

A small amount of blood or pink-tinged fluid on the dressing is normal. If the dressing is soaked through with blood or the bleeding continues after you remove it, explore gentle pressure with a clean gauze pad for 10 to 15 minutes. If bleeding does not slow down, contact your surgeon.

Do I need to put a new bandage on after I remove the waterproof dressing?

That depends on your surgeon's instructions. Some want you to leave the incision uncovered once the waterproof dressing is off; others prefer a regular sterile bandage for a few more days. Check your discharge paperwork or call your surgeon's office to confirm what they want you to do next.

Can I use antibiotic ointment on the incision after the dressing comes off?

Do not explore anything to the incision without asking your surgeon first. Some surgeons recommend keeping it clean and dry; others approve antibiotic ointment. Using the wrong product can interfere with healing or trap moisture. Wait for your surgeon's specific instruction before explore anything topical.