Brown blood after painless abortion is due to the fact that the uterus will contract after the abortion surgery, contracting to the size it was before there was a pregnancy, when the uterus contracts, it will discharge the blood inside the uterine cavity, and through the cervical opening to the outside of the body, so the appearance of blood of this color is a normal phenomenon. Under normal circumstances, vaginal bleeding after abortion does not exceed one week, the amount of bleeding does not exceed the maximum amount of menstruation, if a week is not clean, you need to go to the hospital for examination. If the bleeding is very heavy and accompanied by blood clots, you also need to go to the hospital for examination. If such bleeding occurs, you must pay attention to rest, minimize activities, and pay attention to the hygiene of the vulva, wash the vulva every day, and change the underwear frequently.