Stomach pain 15 days after cesarean section may be due to pain caused by uterine contraction, no need for treatment; may be pelvic inflammatory disease, need to use timely medication. 1. Uterine contraction: 15 days after surgery, the uterus has not yet completed the restoration of the uterus, the uterine muscle fibers will be contracted, the uterine muscle cells gradually return to normal size, the mother may be accompanied by paroxysmal lower abdominal pain, such as this cause of the stomach pain does not need special treatment. 2. Pelvic inflammatory disease: 15 days after cesarean section, women’s body is relatively weak, the body’s resistance declines, some women can be secondary to pelvic inflammatory disease, patients can appear abdominal pain, fever, leukorrhea has a peculiar smell and so on, such as this cause of tummy ache, the patient at this time you need to timely use of medication, commonly used ceftriaxone, metronidazole and so on. There are many other diseases that can lead to stomach pain after cesarean section, patients should consult a doctor in time to clarify the specific condition, in order to carry out individualized treatment under the guidance of professional physicians.