The duration of vaginal bleeding during each menstrual period in women is called the menstrual period, usually between 2-8 days, mostly 4-6 days, less than 2 days is considered too short and more than 8 days is considered too long. During the first 2 days of menstruation, there can be a small amount of vaginal bleeding in the form of dripping or brown or dark red, usually more blood for 1-2 days, and some women may experience lower abdomen and lower back discomfort as well as gastrointestinal disorders such as nausea, vomiting and diarrhea due to pelvic congestion and prostaglandins during menstruation. If you have a prolonged period or a missed period of more than 7 days, you should first rule out pregnancy. If pregnancy is ruled out, it is a menstrual disorder and should be treated by a gynecological clinic in time. Menstruation is sometimes easily affected by emotions, environment, exertion, use of contraceptive drugs, etc., but most of them have no major abnormalities within 2-8 days. In addition, menstruating women should pay attention to personal hygiene, change underwear every day to avoid cross-infection and prevent abdominal pain caused by cold.