If you have two periods in a month, if one bleeds more and the other bleeds less and for a shorter period of time, consider ovulatory bleeding, which generally does not have a greater impact on the body when it occurs occasionally. If it occurs for several months in a row, consider menstrual disorders, or pathological factors such as uterine fibroids, which may be dangerous if not taken seriously. The normal menstrual cycle is 21-35 days. Some patients have a short menstrual cycle and may experience it twice a month. If a small amount of bleeding occurs about 2 weeks after menstruation, it may be right in the middle of ovulation, and some patients may experience this and mistake it for another period. If the amount of blood is not too much and not too long, it can be observed temporarily and does not require special treatment. Other cases may be due to unstable estrogen levels in the body, luteal insufficiency, uterine fibroids, or withdrawal bleeding caused by taking birth control pills, and it is recommended to visit the obstetrics and gynecology department of the hospital. Occasionally, it is not necessary to worry too much when you have two periods a month, so pay attention not to stay up late, tired, etc., and generally recover on your own. If it is accompanied by abdominal pain and swelling, you need to undergo ultrasound or sex hormone examination.