Menstruation twice a month is abnormal, mainly due to abnormal estrogen and progesterone in the body. The abnormal progesterone stimulates the abnormal proliferation of the endometrium, while the abnormal estrogen level leads to the abnormal shedding of the endometrium, resulting in abnormal menstruation. It is recommended that women who menstruate twice a month seek medical attention in a timely manner, as the prolonged occurrence of two periods can lead to excessive blood loss in the body, resulting in severe iron deficiency anemia and even life-threatening conditions. The abnormal menstrual cycle can also lead to abnormal ovulation of the ovaries, which can lead to infertility. Occasional menstruation can be temporarily observed, probably due to changes in the external environment and mood, and most of the symptoms can be relieved through self-regulation and self-management.