A boil, also called a furuncle, is an infection of a hair follicle that goes into the deeper layers of skin, causing an abscess (a small pocket of pus). These infections are typically caused by the ...
A boil on your butt may be fluid-filled, itchy, or painful. An infected or inflamed hair follicle, called folliculitis, is the main cause of boils. Treatment for boils may include home remedies and ...