I was born with a red, puffy birthmark right at the top of my butt cheeks (has always made me wonder if I was born with a tail, but my parents say no). It is oddly shaped and roughly the size of a quarter. The problem is that it itches, on and off, and if I scratch it without thinking, it breaks open and bleeds. I've been using hydrocortisone on it, and trying not to touch it, but this problem has been ongoing since I can remember. I'm poor and without insurance, is there anything I can do at home to make this better?