ITEC Anatomy & Physiology - Skin Practice Exam Prep & Study Guide

A boil, also known as a furuncle, occurs when a hair follicle becomes infected with bacteria, typically Staphylococcus aureus. This infection leads to inflammation and the formation of a painful, pus-filled lump under the skin. Boils often develop when bacteria enter the skin through tiny breaks or abrasions.

In contrast, the other terms refer to different conditions: a carbuncle describes a cluster of boils that are interconnected and typically deeper in the skin, while acne is a common skin condition caused by clogged hair follicles but is not specifically a bacterial infection around a single follicle. Eczema, on the other hand, is a chronic inflammatory condition of the skin characterized by itching and redness, but it is not an infection. Thus, the term that best describes a bacterial infection specifically causing inflammation around a hair follicle is a boil.