What does the term "comedo" refer to in skincare?

The term "comedo" specifically refers to a clogged hair follicle that can contribute to the development of acne. In the context of skincare, a comedo occurs when hair follicles become blocked with excess oil (sebum), dead skin cells, and sometimes bacteria. There are two main types of comedones: open comedones (commonly known as blackheads) and closed comedones (known as whiteheads). Both types are foundational in the understanding of acne and its formation since they can lead to inflammation and further acne-related issues if not treated properly. Recognizing this term is essential for anyone studying skincare, as it helps inform treatment options for acne and its prevention.