Normal menstrual bleeding usually lasts from 3 to 7 days, more than 10 days can be considered as prolonged bleeding and excessive menstrual blood. This condition can be caused by many reasons, such as menstrual strain, cold, endocrine disorders, IUD, gynecological inflammation, fibroids, blood disorders, liver or kidney disease, endometrial abnormalities, etc. After the bleeding stops, we need to check the sex hormone test and ultrasound to identify the cause and then treat the symptoms. Apply hemostatic drugs if necessary. Pay attention to the warmth and rest during menstruation. Chinese medicine: 1. Yin deficiency: prolonged menstruation, continuous menstrual bleeding, low volume, bright red, sticky texture, irritability, dry mouth. Red tongue and fine pulse. 2. Spleen deficiency: prolonged menstruation, menstrual bleeding, small amount, light color, thin texture, fatigue, loose stools. Thin moss, light tongue, thin and weak pulse. 3.Blood stasis: prolonged menstruation, low volume and dark color, sometimes high volume with blood clots, lower abdominal distension and pain, refusing to press. The tongue is purple or with petechiae, and the pulse is stringent. 4. Damp-heat: prolonged menstruation, red and sticky, sometimes foul-smelling, with lower abdominal distension and pain and refusal to press, usually with yellowish color, tiredness of the limbs and heavy gait. The coating is yellow and greasy, and the pulse is slippery. Clinically, Chinese medicine is based on the principle of diagnosis and treatment.