After painless abortion surgery will bleed, because in the process of surgery, after the pregnancy sac is scraped out, there is a little damage to the uterine lining, after the pregnancy sac is discharged, the uterus has to keep contracting, and in the process of contraction, there will be a little blood and the uterus inside the metamorphosis of the tissues, which are slowly discharged. Bleeding time is usually within a week, under normal circumstances, the amount of bleeding will not be greater than the amount of menstruation, and at the same time, there is no particularly noticeable discomfort. If the bleeding is particularly heavy, larger than the amount of menstruation or accompanied by blood clots, you need to consider that it may be due to poor contraction of the uterus or the presence of uterine cavity residue. If the bleeding is particularly low and clears up after a little bit, it is also necessary to consider whether it is caused by excessive force or leakage of suction during the surgical operation. Therefore, it is recommended to have an ultrasound about half a month after the operation to find out how the uterus is recovering.