👉 Furunculus is a Latin word that means "to spread" or "to spread out." It can also refer to a small, round, and often painful bump on the skin. Furunculitis is a type of inflammation caused by an overgrowth of bacteria in the skin. The condition can be caused by various factors such as infection, irritation, or allergic reactions. Treatment may include antibiotics, topical creams, or oral medications.