Patient :My knee has been hurting for about a week off and on. I play tennis, hockey and softball. I don't remember anything happening but it is very stiff (not swollen) and also very sore almost a throb under my knee cap and back of my knee. It also throbs up and down my leg. The most painful thing is to straighten it.
Thank you for your query at AskTheDoctor.com
I understand your concern.
You are into lots of active sports, and the constant running is putting a lot of wear and tear on the knee joint.
That can cause pain around the knee cap. Also, ligament sprain can do the same.
You should get an x-ray for a conclusive diagnosis.
Hope this was helpful,
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