Im 16 and last year i got this small bump on my stomach (lower then the belly button) and i thought nothing of it. It kind of felt like a hard small ball like the back of a screw on earing. (I thought maybe my belt pinched my skin or something) It eventually went away but left a small bruse. Then a few months after that i got the same exact thing on my chest. I went to the docter and she said it was nothing but i should get it checked out but i never got a chance to. She said to put heat on it, and when I did it pussed white then was really red then when away but again let a small bruse. Then tonite i noticed about an inch away from the old bruse i got the same thing and if i put pressure on it , it hurts. And im extreamly scared and im not shure wat to think of it so does any one know what it is?

P.S. and im also sry if this was posted 2 times.