What does the term "comedo" refer to?

The term "comedo" refers specifically to a clogged hair follicle, commonly known as a clogged pore. In the context of dermatology and esthetics, a comedo can appear as either an open comedo (blackhead) or a closed comedo (whitehead). The formation of a comedo occurs when sebaceous (oil) glands produce excess sebum that combines with dead skin cells, leading to blockage. This blockage can result in acne lesions if bacteria proliferate in the clogged pore. Understanding the term "comedo" is essential for estheticians, as it relates directly to skin health and the management of acne. Identifying and treating comedones is a crucial aspect of many skin care treatments.