But there is one big exception: Ingrown hair, the painful cousin to the harmless, yet pesky pimple. Ingrown hairs form when a hair follicle can't get past a clogged pore, making the hair curl back ...

Medically reviewed by Cordelia Nwankwo, MD Most vaginal bumps are harmless, but some might signal an infection. Other causes ...

Pilonidal sinus is a skin infection that causes a cyst near the buttocks, just beneath the tailbone. The infection often occurs when an ingrown hair grows internally and infects the skin.

The most immediate concern with untreated ingrown hairs involves infection risk. When a hair penetrates surrounding skin tissue, it creates a microscopic pathway for bacteria naturally present on ...

commonly and incorrectly referred to as a sebaceous cyst, is a noncancerous lump beneath the skin that originates within a hair follicle. Cysts can develop on almost any part of the body.