An abscess occurs when an infection causes a pocket of pus to develop. Abscesses can develop on the skin, in the mouth, or inside the body. Bacterial infections typically cause abscesses. Pus develops ...

A stye (also known as a hordeolum) is a painful, red lump that forms on the outer edge of an eyelid. It's typically caused by a bacterial infection in an oil gland or eyelash follicle. While ...