Webclick here to subscribe to dr. Webblackheads are usually caused by a pore that gets clogged with keratin (skin protein) and sebum (oil). Webjun 6, 2017 · in this video you can see a few cases of acne mainly manifested by closed comedones, so called whiteheads.

Sometimes large amount of content is cumulated so. Given the black color many believe these spots are clogged with dirt, but.