Ectopic pregnancy after injection of contractions stomach pain may be a normal manifestation, but also need to be alert to postoperative bleeding and other abnormalities. Ectopic pregnancy after injection of hysteronin is to promote pregnancy state of the enlarged uterus gradually retract to restore the pre-pregnancy condition, so after injection of hysteronin uterine contraction will produce contraction-like pain, this kind of tummy ache is a normal reaction to the use of medication, with the gradual alleviation of contraction of uterus, this kind of pain will also gradually disappear. If the stomach pain persists, we need to be alert to whether it is caused by postoperative incision pain after ectopic pregnancy or surgical complications, such as bleeding from the incision, infection, pelvic infection, etc., and this pain will gradually worsen with the progression of time and can not be relieved, and often accompanied by other symptoms, such as fever. Therefore, if necessary, patients should seek timely medical treatment and standardized diagnosis and treatment.