After diagnostic scraping there has been blood on the 12th day of the blood volume increased greatly it is recommended to go to the hospital in time to clarify the cause of the disease, medication or surgical treatment. Generally speaking, after diagnostic scraping, there will be a small amount of bleeding, less than the amount of menstruation, and it will stop within a week, which is a complication of diagnostic scraping. If there is prolonged vaginal bleeding after curettage and a sudden increase in the amount of blood on the 12th day, there may be an infection in the uterine cavity and the spread of the infection after curettage, in which case it is necessary to go to the hospital for examination to clarify the cause of the disease, and anti-inflammatory treatment to stop the bleeding if necessary. After scraping, if the pathology result is hormonal abnormality caused by endometrial hyperplasia and other causes of bleeding, it can be treated by hormone therapy under the guidance of doctors. If it is cancerous, surgical treatment is required according to the condition.