Sebaceous filaments are structures that allow sebum to flow to the surface of the skin. Tiny glands beneath the skin create sebum, which is an oily substance that helps lubricate the skin. When the ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." In the age of filters and air brushing, it can be difficult to remember what real skin actually looks ...

Black dots on the nose are one of the most stubborn and misunderstood skin concerns. Often mistaken for trapped dirt, these marks are usually blackheads or sebaceous filaments—normal structures that ...