The appearance of blood after ten days of diagnostic scraping may be ovulatory bleeding, or it may be caused by vaginal and uterine infections or endometrial diseases. 1. Ovulation bleeding: if blood appears again after ten days of diagnostic scraping, it may be ovulation bleeding because diagnostic scraping is equivalent to a menstruation, and after ten days of diagnostic scraping, if a woman is in the period of ovulation, there may be ovulation bleeding. 2. Vaginal or uterine infection: if after the diagnostic scraping operation, the patient has an infection in the uterus or vagina, the mucous membrane is stimulated, and the phenomenon of blood in the secretion may occur. 3. Endometrial disease: if there is blood after ten days of scraping, it may be caused by endometrial disease, such as endometritis or endometrial cancer, which will lead to abnormal bleeding. If blood appears again after ten days of scraping, it is recommended to consult a doctor in time to clarify the cause of the disease and carry out targeted treatment or therapy.