Hair grows out of pores, small openings in the skin that secrete sweat and sebum (oil). An ingrown hair cyst occurs when dirt or oil blocks off a pore, causing a hair to become trapped. This leads to ...

Eruptive vellus hair cysts were first described in 1977 by Esterly et al in the case of 2 children with a hyperpigmented monomorphous papular eruption of several years’ duration. 1 Since then, various ...

From razor bumps to painful deep cysts, here’s how to identify what you’re dealing with and the science-backed solutions for smooth, clear skin Ingrown hair cysts rank among the most frustrating skin ...