Skin tags are benign growths, meaning they’re generally harmless. But, if it feels like one just appeared out of nowhere, you might be wondering what causes them in the first place. The reality ...

Skin boils are a common condition caused by an infected ... The combination of white blood cells and bacteria causes a fluid known as pus. The inflamed tissue and pus create a painful, red bump.

"A boil is a generic term for a pus-filled bump under the skin," says Dr. Gohara. Causes of boils: "Pus in the skin generally connotes an infection with bacteria such as staph aureus" (a type of ...