Acne on the face during menstruation is mainly related to changes in hormone levels in the body. Women usually in the menstrual period before 7 ~ 10 days or so, the body’s hormone levels will produce certain changes, estrogen and progesterone levels will gradually reduce to the lowest level, androgen levels will be relatively high, when the level of androgens, will stimulate the sebaceous glands to produce more oil, and the shedding of the skin tissue mixing clogged pores, resulting in the accumulation of oil, and can not be discharged smoothly, thus appearing in the phenomenon of long acne. Acne on the face during menstruation is mostly due to physiological factors, when the body’s hormone levels stabilize, will generally subside on its own, if the acne symptoms persist, or aggravated symptoms, it is recommended to go to the hospital in a timely manner for treatment.