Hidden pain in the abdomen after abortion may be caused by normal contraction of the uterus, postoperative infection or residue in the uterine cavity. 1. Uterine contraction. After the abortion, the uterus needs to contract and recover, which may cause pain and bleeding. Generally, this situation is normal and is a process of uterine recovery, which needs no treatment and can be relieved after resting. 2. Postoperative infection. Abortion is an invasive operation, if you do not pay attention to hygiene after the operation, it may lead to bacterial infection, causing pelvic inflammatory disease, endometritis, etc. You can take antibiotics under the guidance of the doctor. 3. Intrauterine residue. Intrauterine residue can also cause vague pain in the abdomen, you can perform ultrasound examination, according to the size of the residue to choose the treatment, take medication or perform a purging surgery. After the abortion, we recommend rest, eat a light diet, do not eat spicy stimulating food, do not have sex in January, you can moderate exercise, is conducive to the recovery of the uterus. If it is caused by infection or residue, it is recommended to review after treatment.