Bacterial skin infections can be spread by shared cosmetics
or washcloths, close human contact,
or by contact with pus from a
boil or carbuncle.
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.