Whether it is normal to have two periods in a month cannot be generalized and should be analyzed on a case-by-case basis. A woman’s normal menstrual cycle is 21-35 days, and the average menstrual cycle is 28 days, with 7 days in advance or 7 days behind being normal. If you have two periods in a month, first of all, you should exclude ovulation bleeding, not menstruation, and some women bleed during ovulation, which is a normal physiological phenomenon, so you don’t have to worry too much. If it is menstrual bleeding, two periods in a month need to look at the specific time. If you have your period at the beginning of the month and then again at the end of the month, your menstrual cycle is within the normal range and is normal. If you have your period at the beginning of the month and then again before the middle of the month, it is abnormal and may be caused by endometritis, pelvic inflammatory disease, uterine fibroids and other gynecological diseases. If menstruation occurs twice a month, it is recommended that the patient go to the gynecology department of the hospital for ultrasound and sex hormone six tests to determine the cause of the bleeding and to carry out targeted treatment.