This is a little strange, but it's bother me. I have had this itchy armpit rash for like 2 months now. It will itch like crazy, then drain the next day, then burn like crazy. It is a reddish, brown color, and swells up. Every now and then I will get a hard lump in the middle of it that hurts like crazy. Every time the lump appears, it gets bigger. Right now it's about the size of a dime. I have tried hydrocortizone cream, antibiotic creams..nothings working. What should I do? Is this a serious problem, like cancer?