The probability of abortion after medical abortion is about 75%, but the vaginal bleeding time is relatively long. If you feel pain in the abdomen on the 5th day after the abortion, you should first consider the possibility of pelvic infection. Because blood is the best medium for bacteria, the body’s resistance decreases after abortion, which can easily induce bacterial infection upstream. The infection after miscarriage is mainly lymphatic, so the infection is more rapid and can easily lead to acute pelvic inflammatory disease, and intravenous antibiotics are recommended for anti-infection treatment. The pain in the abdomen may also be caused by residual tissue, resulting in bleeding and discomfort in the abdomen, so we recommend consultation and treatment.