Medically reviewed by Susan Bard, MD Inner thigh boils are an infection of the hair follicle usually caused by a bacteria known as Staphylococcus aureus (staph). They can develop anywhere on the body ...

A pimple on your butt could be a boil, which is a hair follicle infection. It could also be keratosis: a skin condition where dead skin cells build up in your hair follicles. Acne on your butt is ...