my boyfriend

Olivia
My boyfriend realized a week ago he has a bumb on his penis and he popped it and it got a little bit bigger and reder. He popped it several times and puss comes out every time... I thought about putting some stuff on it that dries pimples up but I don't want to make it worse...he shaved that area so I said it could be an ingrown hair...
 Does any one have an idea as to what it is and how it he can get it to go away?