I have had a couple of bouts with severe pain from my knee to my groin, on the inside of my leg, it first happened a few months ago, now last week and again last night, the paid is so bad it brings tears to my eyes, it just pulls my leg bending at the knee, I can not open it, it lasted about 10 min then the paid started to subside, to the point that I could at least straighten my leg out, which I couldn't do before. This is very scary I did mention to my orthopedic dr the other day he said it would be hard for him to tell unless he saw me when it was happening. I am afraid it is a blood clot or something. I have always thought I had a pretty high pain tolerance but now I am now sure. Do you have any ideas and suggestions.