abdominal pain on the 1st day after abortion, it is recommended to pay attention to the need to exclude the following causes of abdominal pain: 1, caused by uterine perforation, due to improper surgical operation resulting in uterine perforation, may cause acute peritoneal inflammation, internal bleeding, so it will lead to pain in the lower abdomen and more serious, when pressing the lower abdomen with the hand there will be obvious pressure pain, when the hand is lifted there will be rebound pain, must It is important to go to the hospital for examination. If ultrasound reveals that the plasma membrane layer of the uterus is discontinuous and there is a large amount of fluid in the pelvic cavity, it is possible that the uterus is perforated and, if necessary, a caesarean section is needed. 2. After abortion, the blood accumulated in the uterine cavity flows backwards down the fallopian tube and enters the pelvic cavity causing irritation and lower abdominal pain, which can also be initially diagnosed by ultrasound and treated accordingly.