What Could Cause Foul Odor In Belly Button?

i have had a foul odor coming out of my belly button for about a month and at first it was a little swollen. It just turned into a foul smell with some skin irritation and also hair coming out of my belly button, I put neosporin in it for the skin irritation but that hasnt gone away completely. Now there is some blood coming out of the belly button. It isnt alot at all but when I check it I see some dry blood on it. I workout alot and do Brazilian Jiu Jitsu could this have something to do with it?