This is often caused by the following reasons: 1, chronic enteritis, chronic enteritis caused by many reasons, such as eating inappropriate food for a long time, or long-term alcohol consumption, sometimes also due to autoimmune diseases, which need to go to the hospital to further improve the relevant examinations, such as routine blood, C-reactive protein, autoimmune antibodies, and colonoscopy and other tests, according to the results of the medication or enema therapy. Or enema treatment, etc.; 2, may be chronic appendicitis, although appendicitis will appear persistent abdominal distension and pain, but chronic appendicitis is generally manifested as abdominal pain, usually does not appear fever and other symptoms, which can go to the hospital to check the abdominal ultrasound and other clear. If the disease, it is recommended to perform surgical resection; 3, may be caused by bladder diseases, such as chronic cystitis, etc.; 4, some inflammatory or tumor lesions in the abdomen can also cause abdominal pain, you need to go to the hospital for timely consultation.