Re: Stabbing pain in kneecap
Kneecap pain is very common. You could just have an irritation behind there from movement and strain. Depending on your age you could also be developing some kneecap arthritis but this is more common when people have history of bad knees, etc. If you try some rest and over the counter anti inflammatories (ibuprofen, aspirin, or aleve depending on what has worked for you in the past) and they don't help after a few weeks then I'd get it checked out. First step would be knee xrays and exam.
Rt&Lt thumb arthroplasty 2012 ; RT TKR & Bilat CTS 2011
Fusions: L5-S1 (87), L4-S1 (93), C5-C7 ('06), L3-S1 ('10)
C5-C7 foraminotomy 08