Im 16 and have seven on my left armpit/pec/shoulder area, two on my right, and some smaller ones but quite numerous on upper thigh like alot of you have mention. I dont run anything and when you guys say bulk, im not sure what type you mean
never the less I guess this is just a normal part of gettin bigger if the conditions are right for them to show up. My friends think im a Bad A now lmfao. and the cosby kids at the pool is a great one just sayin. Anyways, I was thinking, the stretch marks could be prevented if the skin was somehow stretched prior to exercise? like I think mines from benching, bringing the bar completely to my chest pushes me a good 6 inches beyond the normal range my arms are capable of stretching, so it stretches skin to a point it never experience except during bench. so it you somehow got your skin more elastic then it would prevent it? just something to think on.