The term “great aunt” refers to menstruation. If you have two periods in January, it may be caused by physiological reasons such as ovulation bleeding or pathological reasons such as endometritis, endometrial polyps, cervical lesions, etc., which need to be analyzed specifically. 1. Physiological reasons: during ovulation, as the endometrium loses the support of estrogen, it will shed, mainly manifested as ovulation bleeding, which lasts for 1~3 days and can stop by itself. Normally, no treatment is needed, and daily observation is sufficient. 2. Pathological causes: cervical polyps, endometritis, endometrial polyps and other diseases can cause vaginal bleeding, which is mistaken for menstruation, so there will be two periods in a month. There may be other reasons for menstruation twice a month. It is recommended to go to the hospital for a systematic examination to clarify the cause of the disease and then treat the symptoms.