Define tranche. tranche synonyms, tranche pronunciation, tranche translation, English dictionary definition of tranche. n. 1. A portion of a total, especially of a block of assets such as cash or securities: the riskiest tranche of the bond offering; money delivered in two...
A boil is a red, swollen, painful bump under the skin. It often looks like an overgrown pimple. Boils are often caused by infected hair follicles. Bacteria from the infection form an abscess, or pocket of pus. A boil can become large and cause severe pain. Boils most often happen where there is hair and rubbing. The face, neck, armpits, breasts, groin, and buttocks are common sites.
Abscesses may appear both on the skin surface and within the deeper structures of the skin without always involving a hair follicle. Most abscesses are caused by Staphylococcus aureus bacteria (see Staphylococcus aureus Infections) and appear to be pus-filled pockets on the skin surface. Recently, a strain of Staphylococcus that is resistant to previously effective antibiotics has become a more common cause.