Such a painful rash can be due to a boil, abscess
or herpes sores. A boil, also referred to as a skin abscess
, is a localized infection deep in the skin. A boil generally starts as a reddened, tender area. Over time, the area becomes firm and hard. Eventually, the center of the abscess softens and becomes filled with pus. Most individuals have no or only minimal signs or symptoms from HSV-1 or HSV-2 infection.