i have pain in the back of my left knee. after walking for a while i get an excrutiating pain to where i have to limp. after walking for about 30 minutes or standing long periods or driving a long distance i get a pain in the back of my left knee crease that feels like i cant straighten my leg out so i have to limp this also includes a burning sensation above the pain in my thigh. eventually i can mange to walk on it but it doesn't go a way unless i sit for a while. i have taken motrin since i know it helps with inflamation. i also can't bend my leg all the way back because of the pain.
i'm sorry to hear you're going through this. here you are exercising like doctors tell us to and then you have an uncomfortable problem occur. it seems a little unfair doesn't it? i'm going to recommend you see a doctor about this. while several things could cause the symptoms you describe -- and i'm not a medical doctor myself -- your situation sounds an awful lot like it could be a baker's cyst. a doctor could tell you for sure. baker's cysts are not cancerous or life-threatening in any way. but they sure can interfere with exercise -- and even with activities of daily living. your doctor can suggest ways to treat the cyst on your own and if those don't work he or she can perform a small procedure to drain the cyst. of course your knee problems could have many other causes such as tendinitis and arthritis. your doctor can diagnose the issue with a physical examination and possibly an x-ray. wishing you well!