okay so im 13 and my brest hurt. there already a size C/D (depends) what could be happining?
well im not sure wow! c/d.. anyhoo lol mmm, maybe that there growing or if your neear your period, some have a sign of breast pain or its a known fact that if you are small (not in age I mean lol) and have big chests, it can be painful because its too much weight on a boddyy adn can give back pain too soo yeha. if its none of these, it wudnt hurt to go see your doctor. im sure its nothing seriuos, juss something related iwht puberty I guess lol well gud luck!! =]
It most likely hormones, (I get really sore boobs around my period) or poor bra choice. Get a professional measure up at a department store and try to go for thick straps for better support.