An abscess is a collection of pus and debris that forms a painful, red lump. Some of the most common locations that abscesses appear are on the skin, in armpits, the anus, vagina, spine, tooth, or groin. Some abscesses are formed by an area of inflammation around a hair follicle -- these are called boils. Though antibiotics may be given, they do not cure an abscess. The normal treatment is an incision and drainage. Follow the links below to find WebMD's comprehensive coverage about how an abscess is caused, what it looks like, how to treat it, and much more.