The sebum reaches the skin ... especially patients with dark skin with hyperpigmentation,” she added. A list of the best acne treatments wouldn’t be complete without a salicylic acid face ...

2a). Another type of pimple, called a blackhead (Fig. 2b), appears when sebum and dead skin cells clog the pore but not the opening, as in a whitehead. While the pore is clogged, its surface remains ...

Blackheads, also known as open comedones, start as sebum plugs ... and dead skin cells, according to board-certified dermatologist Dr. Deborah Spey. Blackheads turn black when exposed to air ...