Medically reviewed by Susan Bard, MD Boils are painful, pus-filled, and are caused by infections like Staphylococcus ...

Also known as a pilonidal cyst, the condition forms when a sac of tissue fills with air or fluid in the crease of your buttocks. Pilonidal cyst, doctors say, is mostly caused by a skin infection.

A skin abscess or boil is a bump on or below the skin’s surface. It may look like a pimple but larger and deeper under the skin. Abscesses usually contain pus or clear fluid and can appear anywhere on ...

A subareolar abscess is a lump that forms on the breast. This lump can be painful and include swelling. The bump is a collection of pus. Subareolar abscesses can be painful. They can make your breast ...

A retropharyngeal abscess is a life-threatening collection of pus that forms in the back of the throat. It typically develops when the lymph nodes behind your throat become infected. They may have ...