In this case, if the patient is not using contraception, the first consideration is whether the abnormal bleeding is caused by pregnancy. It is possible that the residual blood in the uterine cavity has not been completely eliminated, and if the woman is strenuously active afterwards, it may promote the continued discharge of the blood in the uterine cavity. It is possible that the patient has endometrial lesions and needs to be seen in the hospital as soon as possible for gynecologic ultrasound and, if necessary, diagnostic curettage. It may be due to endometrial polyp or uterine scar diverticulum, etc. Patients need to go to the hospital as soon as possible for examination to clarify the diagnosis, and hysteroscopy if necessary. It may be due to endocrine disorders that cause menstrual disorders, such as recent work stress, mental tension, mood swings, etc., all of which may cause abnormal bleeding in women.