causes of hormonal acne
Primary causes of acne. 1  Excess sebum, or oil gland, production (influenced by hormones). 2  Skin cells that shed become abnormally sticky and accumulate, or clog up, in the hair follicle (influenced by hormones). 3  Increased number of the acne-causing bacterium Propionbacterium acnes, or P. acnes. 4  Skin inflammation. more information...