For the last few years I've had this persistent bump on my chest that does not go away. Last month I bought a metal black and white head remover, so I tried it out on my bump. At first it just pussed then 2 days later I was able to pop it and have a long white head come out. After that the bump went away. Today I noticed the bump was back, this time I just scratched at it and nothing happened, about an hour later I pushed on it and it popped again, releasing another white head. My question is how do I keep it from coming back and why doesn't it go way when left alone for years at a time!?