I can not fully bend or straighten my left knee and experience sharp pain when attempting to do so, no swelling, no redness and no other symptoms. I recently started jogging again but do not recall any injuries or incidents. any idea what could be wrong
The pain at knee after initiation of jogging without any history of injury suggest some sort of muscle pull or spasm. Most common muscle group which causes such pain are hamstrung group of muscles which are situated to back and inner side of knee. Avoid jogging for few days and starts stretching exercises of knee muscles by fully extending and flexing of knee .if pain is severe and disturbing normal walking then you can start some analgesic such as ibuprofen and muscle relaxants (thiocolchisides).if pain does not subside in 5-7 days then you will have to visit your rehab specialist. Hope this answers your question .if you have further questions I will be happy to help.