When should you see a doctor for meniscus tear?
Last updated September 6, 2026.
See a doctor if your knee locks or catches, gives way under your weight, will not fully straighten, or swelled up within a few hours of a twisting injury. Those mechanical signs suggest a torn piece of cartilage is caught in the joint, which does not resolve on its own. Get care the same day if you cannot put weight on the leg at all, if the knee looks out of shape after a hard impact, or if it is hot and red with a fever. Many smaller tears calm down over a few weeks with rest, ice, compression, elevation, and gentle range-of-motion work, so make an appointment if pain, swelling, or stiffness is still limiting you at the three week mark. After about age 40 a meniscus can tear during ordinary movements like squatting, so persistent pain along the inner or outer edge of the joint is worth checking even without a clear injury. A clinician can examine the knee, order imaging if needed, and tell you whether physical therapy or a surgical opinion makes sense.
What to do
- Watch for locking: A knee that catches, clicks painfully, or will not straighten needs an exam rather than more waiting.
- Track the swelling: Note how fast the knee swelled after the injury, since swelling within a few hours points to a structural problem.
- Use RICE early: Rest, ice for 15 to 20 minutes at a time, compression, and elevation reduce swelling in the first few days.
- Keep it moving: Gentle bending and straightening and light quadriceps work help more than complete immobility once pain allows.
- Set a three week check: If pain, swelling, or stiffness still limits walking or stairs by then, get it evaluated instead of waiting longer.
- Go urgently for red flags: Inability to bear weight, visible deformity, or a hot swollen knee with fever needs same-day medical care.
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