Webdec 7, 2023 · an abscess, also known as a boil, is a localized infection that affects the skin and underlying tissues. It is usually caused by bacteria entering the skin through a cut or. Webjul 17, 2024 · a boil is a contagious skin infection that starts in a hair follicle or oil gland. At first, the skin turns red in the area of the infection, and a tender lump develops. Webjun 26, 2022 · most boils are caused by staph bacteria (staphylococcus aureus), which many healthy people carry on their skin or in their noses without a problem.