What are blackheads, which are masses of sebum trapped in hair follicles, also known as?

Blackheads are indeed known as comedones, which is the term used to describe clogged hair follicles filled with sebum, keratin, and sometimes bacteria. When the follicle is open to the skin's surface, the sebum oxidizes and turns dark, giving blackheads their characteristic appearance. The term "comedones" encompasses both open comedones, such as blackheads, and closed comedones, commonly referred to as whiteheads.

Understanding the nature of comedones is essential in dermatology as they are a common form of acne. The distinction between various types of skin lesions is also important: pustules are filled with pus, macules are flat discolorations on the skin, and papules are small raised bumps. Each of these descriptors refers to specific characteristics of skin lesions, making it crucial to accurately identify them for effective treatment and management. In this context, identifying blackheads as comedones provides clarity in the understanding of acne and its various presentations.