The causes of pain around the belly button in diarrhea may be the following: 1. Consider that the patient has acute enteritis or chronic enteritis. Acute enteritis is mostly caused by bacterial infection, food contaminated with bacteria or eating expired food. Chronic enteritis is mostly caused by long-term poor dietary habits, and lifestyle habits and immune factors. 2. Consider that the patient may have colorectal tumor, or gynecological tumor, a large number of inflammatory factors around the tumor will stimulate the abdominal nerve tissue causing cancer pain. 3. Consider that the patient may have intestinal obstruction, intestinal obstruction is located in the small intestine or colon, there will be symptoms of pain around the navel. 4. Consider that the patient may have parasitic The common type of infection is roundworm infection, which can cause pain like drill top. 5. Consider that the patient has peritonitis or other local diseases.