Hidden abdominal pain after abortion may be related to uterine contraction and inflammation. For a short time after abortion, the feeling of abdominal pain will be produced due to uterine contraction, which usually appears within 1~2 days after abortion, presenting intermittent lower abdominal pain, similar to menstrual cramps. The pain is short-lived and quick, gradually decreasing with time, often accompanied by transient vaginal bleeding. The above situation is a normal physiological phenomenon during the gradual contraction of the uterus after abortion. The presence of a large wound after an abortion increases the risk of infection. Most of the infections in the uterine cavity are caused by inadequate local care after abortion and early sexual intercourse after the operation. Infection of the uterine cavity will produce inflammation and cause hidden pain in the abdomen. When abdominal pain after abortion occurs, it is recommended to consult a doctor for further examination as prescribed by the doctor, to clarify the cause with the help of the doctor, and to carry out targeted treatment or therapy.