Since the last week of August, I've had a sharp pain in my knee. It's occurs in my left knee, on the inside. It's very near to the platella, but I don't know if it's the tibia or the fibula. It's the bone that kind of slightly juts out. Anyways, it hurts to bend the knee and walking up and down stairs causes slight pain as well. Any insight on the problem is appreciated. Thanks for your time!