If there is still bleeding 13 days after the abortion, and if the patient does not have abdominal pain, fever and other abnormalities, it is initially considered that it may be related to the recovery of menstruation, and there is no need to be particularly worried. However, it may also be caused by diseases, mainly including intrauterine tissue residue, poor uterine recovery and infection. If you can’t tell, we suggest that you go to the hospital for further ultrasound examination to clarify the cause of the bleeding: 1. Recovery of menstruation: Generally speaking, women’s menstruation recovers in about 1 month after abortion. However, the recovery time of menstruation may be different for women due to postoperative recuperation, psychological pressure, uterine recovery, etc., and the phenomenon of early or delayed menstruation may occur; 2. Intra-uterine tissue residue: During the abortion surgery, the desiccated membranes or placental tissues may be adhered to the uterine cavity, and may be retained if they are not cleansed or cleansed uncleanly. If the residual amount is small, it may not cause symptoms, or affect menstruation causing increased menstruation, manifested as bleeding. If there is a lot of residual tissue, it can cause heavy vaginal bleeding, mostly bright red, which can be accompanied by lower abdominal pain. When the intrauterine tissue residue HCG measurement, ultrasound can be a clear diagnosis, if necessary, need to carry out purging surgery; 3, poor uterine regeneration: after abortion, strenuous activities, do not pay attention to food and drink, poor rest, etc., this time, the color of the vaginal bleeding for the dark red, the amount is not too much, and occasional abdominal pain, but the abdominal pain is not obvious, ultrasound can assist in the identification of the uterus to give the uterine contraction of medication to alleviate the problem; 4, infections: without the correct care and not pay attention to private hygiene, can lead to a large amount of bleeding. Not pay attention to private hygiene, can lead to infection, cause pelvic inflammatory disease, endometritis, intrauterine infection and other diseases, manifested as vaginal bleeding, at the same time can be accompanied by discharge odor, abdominal pain and fever and other symptoms.