my son has stretch marks on his back but it not stretch marks it is about the size of a watermelon when I google it the computer came up with Bartonella and the images online look just like it and we noticed it about two weeks ago when he came back from his dads for the weekend and the places his dad takes him is not always the cleanest and one place has like 33 cats with fleas and matted shut eyes he has says that he is fine but I don t want nothing to happen to him at first I thought it was from him sitting on his game to much so I told him he need to take more breaks and to lean against a pillow or something but when I notice it is not going away that is when I wanted to make sure nothing was wrong