My left knee started getting sore about a year ago. About one or two days a month I would get a twinge in it whenever I bent it any more than about 45 degrees and put any weight on it. It would just kinda "give out" so to speak. The "twinge" feeling would happen in the middle of the back and at the bottom right just below the knee cap (about 5 o'clock if you are looking at it). Now within the last month or so it has been getting worse. There isn't a lot of pain (2 out of 10 on the pain scale), but it's causing some problems. When I keep my leg in the same position for a while (driving, riding my motorcycle, basically whenever Im sitting), it becomes very stiff feeling. I can't sit still for more than a few minutes without readjusting or getting up and walking around, and its keeping me from falling asleep at night. I know it's impossible to know what it is without getting checked, but I just wanted some input from anyone who has had knee problems or experiences anything similar to this. I know I should see a doctor, and I plan on making an appointment next week. The military doctors are just gonna prescribe me some ibuprofen and tell me to come back if it gets worse though, and if you want an MRI you have to wait a long long time to have one done. Just looking for your $.02 for now......