Hidden pain in the stomach after full moon may be a normal recovery phenomenon, or it may be caused by enteritis, pelvic inflammatory disease and other diseases. 1. Normal recovery phenomenon: the uterus needs a certain amount of time to recover, so the feeling of vague pain in the stomach may occur during this period. 2. intestinal inflammation: it may be due to the inflammation of the intestines caused by the unclean diet after delivery, and the inflammation stimulation will lead to the spasm of the smooth muscle of the intestines, and then the feeling of vague pain in the stomach will occur. 3. Pelvic inflammatory disease: it is due to the inflammation caused by the infection, the inflammation will stimulate the local organs, resulting in swelling, it will compress the surrounding nerves resulting in vague pain in the stomach. The vague pain in the stomach after the full moon may also be seen in the urinary tract infection, cystitis and other diseases, if the symptoms of the vague pain in the stomach after the full moon, persistent and unrelieved, you need to consult a doctor in time to clarify the specific causes of the disease, and under the guidance of the doctor to give targeted treatment.