I need some advice... I seem to have hurt my leg and I can t work out what i ve done or how and it s starting to worry me. On Friday night I brushed my right leg against my left, not hard and had a sharp pain on the inside of my left knee... I touched it through my jeans and it felt like a knuckle sized lump had popped up and it was insanely painful. It felt like I had maybe been bitten. I went to the bathroom to check it out and could see it wasnt a bite, it wasn t red like a bit or sting and there was no entry point, just a very angry protruding vein... I hobbled about for about another hour before I got home and took off my jeans and a little purple bruise had started to form but the lump had dissapeared... The next day a large purple bruise developed and is now the size of half a fist i guess? it doesnt hurt more than a bruise do you think ive done something like a vein has ruptured or something? Do I need to go to the doctors...