Causes of Acne on Cheeks and Forehead

Acne is the wholesale term used to refer to the bumps on your skin that occur when your hair follicles plug up with dead skin cells and an oily substance called sebum. That isn’t quite the same as what we typically think of as “pus.” Pus is a white liquid mix of white blood cells that have died off after fighting an infection, while sebum is typically thicker and more yellow. Blocked pores typically turn red first, because blood rushes to the site to fight infection. As white blood cells die off in that battle against bacteria, it dies off, …

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