Depends...: Hard to say what the cause is without a little more info--how long this been happening? Both knees? Where is the pain exactly? Just below the knee (tibia)? Front of knee (patella)? Inside? Behind? Is it worse at night? With movement? Clicks/pops/cracks? Swelling? After sports or at the end of the day? It would be worth seeing your pediatrician about it, especially if you're serious about sports.
Answered 10/31/2015
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2 doctors weighed in across 2 answers
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