Is a blackhead classified as a closed comedone?

A blackhead is classified as an open comedone. This is due to the fact that it is formed when a hair follicle becomes clogged with oil, dead skin cells, and bacteria. When this clog is exposed to air, the material inside the follicle oxidizes and turns dark in color, which characterizes a blackhead.

In contrast, a closed comedone refers to a clogged follicle that remains beneath the skin surface, presenting as a small, flesh-colored bump. This type of comedone is not exposed to the air, so the contents do not oxidize and therefore do not change color.

This classification is important in acne treatment, as different types of comedones require different approaches for effective management and prevention. Understanding these classifications helps in accurately assessing and addressing various forms of acne.