What causes a dilated pore of Winer?

What causes a dilated pore of Winer?

A dilated pore of Winer forms similar to a blackhead pimple, where dead skin cells clog the pore (hair follicle). As a result, the dead skin cells in the pore create a protein (sebum and keratin) that collects and plugs up the pore, causing the pore to enlarge (dilate). The clogged pore turns black when the contents of it combine with air exposure (oxidization).

While the direct cause of a dilated pore of Winer is unknown, it has been associated with people who have a history of severe acne and/or cystic acne.