These can be due to boils or carbuncles. 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. Finally, the pus "forms a head," which can be surgically opened or spontaneously drain out through the surface of the skin.
Apply warm compresses on the boil and keep the area clean.