SULFA DRUGS. One of the more common drug allergies is that to sulfa drugs. Sulfa drugs are more appropriately labeled sulfonamides and are derivatives of para-amino benzoic acid. The table below lists common medications that contain a sulfonamide component.
A boil is a common, painful infection of a hair follicle and the surrounding skin. It begins as a red lump, then fills with pus as white blood cells rush in to fight the infection. Good home care can often clear up a single boil, also known as a skin abscess. A doctor's care is needed when a boil resists treatment or develops in certain vulnerable areas of the body.
Boils facts. A boil, or skin abscess, is a collection of pus that forms in the skin. Boils symptoms and signs include: a firm reddened bump, tender, swollen skin surrounding the bump, the bump may increase in size, pus-filled head on the bump, which may spontaneously drain, weep, or ooze.