The normal menstrual period is between 3 and 7 days, but prolonged menstruation is a symptom that many women have encountered. It refers to the phenomenon that the menstrual period lasts for more than 7 days and even extends for half a month before it clears, which is known as prolonged menstrual period in Chinese medicine. This is often caused by endocrine disorders, such as women who have not yet had children may lead to infertility, excessive menstrual bleeding it can be caused by many reasons, the common ones are: menstrual fatigue, cold, endocrine disorders, IUD, gynecological inflammation, uterine fibroids, blood disorders, liver or kidney pathology, endometrial abnormality and so on. After the bleeding stops, you need to check the sex hormone six and ultrasound to find out the cause of the bleeding and then treat the symptoms. If necessary, apply medicines to stop bleeding. The most important thing is to pay attention to the warmth and rest during the period of menstruation.