(adsbygoogle = window.adsbygoogle || []).push({}); I am 15 and am not overweight nor have I ever been (Around 115 pounds). I noticed stretch marks on the left side of my body. I am concerned on what it might be. I am thinking that it might be because I lost 7 pounds over the summer and I am 5'10 or so. Please, if you have any suggestions on what this could be, let me know.

Im not sure what it could be. I play 3 sports and lift and ive never gotten them. But my friend only plays football and he isnt overweight and he had like 6 on his back.