Reference Terms
from Wikipedia, the free encyclopedia


A blackhead (technically known as a open comedo) is a yellowish or blackish bump or plug on the skin.

An open comedo or blackhead is a type of acne vulgaris.

It is caused by excess oils that have accumulated in the sebaceous gland's duct.

Note:   The above text is excerpted from the Wikipedia article "Blackhead", which has been released under the GNU Free Documentation License.
Related Stories

Science News
May 27, 2017

Latest Headlines
updated 12:56 pm ET