Blackhead
Blackhead
Blackhead (pronunciation: /ˈblækˌhɛd/), also known as open comedo (pronunciation: /ˈkɒmɪdoʊ/), is a type of acne that is characterized by a darkened surface.
Etymology
The term "blackhead" is derived from the appearance of the condition. The surface of these types of acne lesions is dark or "black," hence the name "blackhead." The term "comedo" is derived from the Latin word "comedere" which means "to eat up." It was historically used to describe parasitic worms; in modern medical terminology, it is used to describe acne.
Description
Blackheads are a type of acne that forms when a pore is clogged with dead skin cells and sebum. The black appearance is not due to dirt, but rather from the oxidation of the substances in the pore when exposed to air. Unlike whiteheads, which are closed, blackheads are open to the skin's surface.
Causes
Blackheads are caused by the overproduction of sebum, an oily substance that helps protect the skin. When too much sebum is produced, it can combine with dead skin cells to block the pores. This blockage can then oxidize and turn black when exposed to air.
Treatment
Treatment for blackheads typically involves over-the-counter products that contain salicylic acid, benzoyl peroxide, or retinoids. These ingredients work to break down the substances that clog pores and can prevent future blackheads from forming. In some cases, a dermatologist may perform a procedure called a comedo extraction to remove blackheads.
Related Terms
External links
- Medical encyclopedia article on Blackhead
- Wikipedia's article - Blackhead
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