The most common diseases that cause pain in the belly in women are the following three: First, urinary tract infections, which are clinically manifested as pain in the belly and frequent, urgent and painful urination, and some patients may have a fever, and it is recommended that patients improve routine urinalysis and routine blood tests to assist in the diagnosis. Patients with uterine and adnexal diseases, such as inflammation, tumor and ectopic pregnancy, may have pain in the belly, and it is recommended that the patient visit the gynecology department in a timely manner and complete gynecological ultrasound examinations to assist in the diagnosis. The patient will have pain in the small stomach with diarrhea, and some patients will have nausea, vomiting and fever. It is recommended that the patient improve routine blood tests and routine stool tests to assist in the diagnosis, and if necessary, improve colonoscopy. Fourth, if the patient has a large intestinal tumor, the same will cause small stomach pain, it is recommended that the patient improve the colonoscopy.