Comedones are a type of acne that occurs when hair follicles in the skin become clogged by oil, dead skin cells, and debris. This causes small bumps commonly known as blackheads (open comedones) or ...

Zits. Pimples. Pustules. Acne gets called a lot of things, but "comedones" isn’t one you hear your friends say often. That being said, you’ve probably dealt with them before. Comedonal acne refers to ...