If a woman’s menstrual flow is very low and accompanied by a drop in the abdomen, and the menstrual blood does not travel well, the following possibilities are mainly considered. First, women’s uterus excessive flexion leads to menstrual blood downward poorly, menstrual blood in the body of the uterus or uterine fundus accumulation, mostly due to pelvic inflammation or uterine adenomyosis caused by the uterus and the pelvic tissue adhesion and caused. Secondly, the abnormal vaginal bleeding caused by the patient’s preeclampsia or ectopic pregnancy is not menstruation in the true sense of the word. Therefore, women of childbearing age should check blood or urine HCG to rule out the possibility of pregnancy when this condition occurs. Thirdly, the patient has adhesion of the endometrium or partial adhesion of the cervical canal, which leads to poor downward flow of menstrual blood. Especially when this situation occurs after abortion or uterus removal surgery or after microwave or self-coagulation surgery, it should be highly suspected that adhesion is the cause.