Acne necrotica millaris

This condition is recognised by pustules along the front hairline typically, although they can also occur elsewhere on the upper body. The pustules may be slightly painful and are often pruritic or itchy. When they involve the scalp the pustules may leave small patches of cicatricial (permanent) scarring as they have a central necrosis, which can destroy the hair follicle. This condition is considered to be of an unknown origin, although stress is often incriminated in precipitating occurrences