my boyfriend has a wierd greenish dishcarge from his belly button, it smells rilly bad, he has no irritation or anything that i can see from the outside, but when he puts alcohol on it it rilly hurts him, he says hes never actually felt the end of his belly button, he actually thinks it has no end. Is this even possible or does he just have some kind of infection? I dont think its yeast because its not white or itchy. What could be the problem?