You need to see a doctor, if you have not already. They could be boils and not pimples- people often get boils on their buttocks, and sometimes they become clusters of boils, called carbuncles. Carbuncles connect under the skin in a little tunnel network of infection. They are very painful, and often need treatment. Don't try to pop them- if they are boils, the infection can spread badly.

you need ass proactive

GROSS !!! Step away from the 'roids...& wash your ASS !! Try washing your underwear too ! YAAkk !!!

Haha

I've had backne and I've seen people get it on their arms and even in their ears, but never have I heard of getting acne on your rear.. But I guess anywhere you have pours you can get it! Perhaps it's long past time to go to the doctor, OP.

pooper pimple poppin' party perhaps?

Oh my! I'm really sorry..

It's called washing your ass.. Maybe then you would have that problem. They do make suck thing called body wash.!

Get a monkey. You can do each other.

What a pain in the ass.