Heavy bleeding during menstruation is not life-threatening, but it can be harmful to the body when it occurs during menstruation. The causes of heavy bleeding during menstruation are often related to diseases, such as uterine fibroids and ovarian cysts. Heavy bleeding that occurs during menstruation is usually not life-threatening, but it can easily lead to serious consequences, such as anemia, physical weakness, dizziness, pallor, and weakness of the limbs. If the sudden heavy bleeding does not occur during menstruation, it is also more dangerous and prone to hemorrhagic shock, so it must be taken seriously. Promptly go to the hospital for standardized examination and take appropriate measures to stop bleeding. The most common diseases include ruptured corpus luteum and ectopic pregnancy. According to the normal physiological cycle of women, medical history, physical signs and auxiliary examinations, it is possible to make the appropriate diagnosis.