The presence of pain in the small of the stomach indicates a high probability of inflammation, especially in patients with pelvic inflammatory disease, with recurrent abdominal pain, which occurs more often in female patients and can be triggered by exertion and aggravation of symptoms. Patients with acute gastroenteritis may also experience pain in the abdomen or around the umbilicus during acute episodes, with severe nausea and vomiting, and dehydration. Some patients are affected by tumors, which are a disease with a very high incidence. The causes of tumor include environmental factors, self factors, and daily diet structure and living environment are all related to a certain extent.