I have a bump, that is painful sometimes, on the inner part of my buttocks . It seems to resemble a blister sometimes (as it forms a dome and liquid fills under it) and when it pops out comes blood and a whitish clear fluid. I can also feel off to the side of it leading to the infected area an fairly hard duct it seems that is about and inch long and seems to go towards my crack . any idea of what i m dealing with? it doesn t ever open up unless its popped.