How Much Swelling Is Normal After Partial Knee Replacement?
Visible swelling for 4–6 weeks, mild residual swelling for 3–6 months — all normal.
Swelling is the body's normal response to surgery. The knee will look noticeably puffy for the first 4–6 weeks, with peak swelling at days 3–5. Mild swelling at the end of an active day can persist for 3–6 months, especially if you have been on your feet.
Management: elevate the leg above heart level for 20 minutes several times a day, ice for 15–20 minutes after activity, and wear compression stockings as instructed. Walking actually reduces swelling — bed rest worsens it.
Warning signs that need urgent review: sudden one-sided calf swelling and pain (possible blood clot), the knee becoming hot and red (possible infection), or swelling that suddenly worsens after improving.
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