Maskne' is a form of acne mechanica, and the most common cause is heat and friction." Basically, when your mask rubs against your skin and moisture develops, it gets trapped in your pores.

Rubbing or putting pressure on the skin, combined with heat or sweat, irritates and inflames follicles. This causes a specific type of acne called acne mechanica. Try to avoid sources of friction ...

2. Acne vulgaris Also known as hormonal acne, these lesions form when the skin generates an excessive amount of sebum, or oil ...