Possibly arthritis: Knee cap pain conditions are common: either patellofemoral syndrome or chondromalacia patella. Both manifest with pain deep or behind the knee cap worse with stairs, inclines/declines, kneeling/squatting, sitting for long periods of time. Anytime the knee is bent deeply, the kneecap engages in its groove on the end of the thigh bone which can cause the irritation/pain.
Answered 2/24/2016
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
5 doctors weighed in across 2 answers
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