Definition of Blackhead

Reviewed on 3/29/2021

Blackhead: A familiar term for what is medically called an open comedo. A comedo, the primary sign of acne, consists of a widened hair follicle filled with skin debris, bacteria, and oil called sebum. A blackhead has a wide opening to the skin and is capped with a blackened mass of skin debris. In contrast, a closed comedo, commonly called a whitehead, has an obstructed opening to the skin and may rupture to cause a low-grade skin inflammatory reaction in the area.

QUESTION

Acne is the result of an allergy. See Answer
References
Kasper, D.L., et al., eds. Harrison's Principles of Internal Medicine, 19th Ed. United States: McGraw-Hill Education, 2015.

Health Solutions From Our Sponsors