I have this quarter sized blacleaning purple bump almost like a big pimple on my right butt cheek and it hurts ssometimes when I sit or laying down it s been there for awhile now. Tonight I tried to pop it and it just got bigger and hurt really bad I cleaned it with alcohol and next thing I new it turn black and I was told to put peroxide on it when I did this white stuff came up and now it won t come off it s really gross I tried to squize it and all that came out was a yellowish blood and nothing else and it s ten times bigger now. What do I do