While menstrual acne can be bothersome, it's part of the body's natural response to hormonal changes. Menstrual acne, commonly referred to as period acne, is a widespread skin problem that affects many women during their menstrual cycle. While menstrual acne can be bothersome, it's part of the body's natural response to hormonal changes. Excessive sebum production: Increased oil, combined with dead skin cells, can clog pores, leading to acne. Bacterial growth: Excess oil creates an environment for Propionibacterium acnes (acne-causing bacteria) to thrive, leading to the development of acne.