Capsaicin cream OTC: Sudden knee pain is usually the result of overusing the knee or suddenly injuring it. In many cases of knee pain, you don't need to see your doctor. Apply moist heat, rest your knee and limit its movement, use otc capsaicin cream. If your pain is not improving after 7 days, see your pcp for evaluation, imaging and treatment.
Answered 5/4/2014
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