I cut my hair and ended up having a pimple-size bump on the back of my head. It bleeds and even sometimes pus came out. At first I ignored it, thinking it will go away. But now there's even more and have gotten a little bigger. I thought it could be keloids; if so how, do I prevent them and make them go away? Is there a keloid removal cream or something I can put it. I tried to using rubbing alcohol and even benzoyl peroxide cream but nothing works. Can someone please help me out? Thanks.