A bout of cramping in the lower abdomen is more likely to be considered intestinal spasm, especially if the patient has symptoms of gastrointestinal irritation such as fever and nausea. It also needs to be further combined with abdominal ultrasound and other related examinations. In the summer and autumn season, the prevalence of gastroenteritis is related to diet, and the patient may also have diarrhea. Severe diarrhea can lead to fluid loss and imbalance of the internal environment, and intravenous fluid supplementation and anti-infective treatment are also required if necessary. There are also patients with occupational lesions of the intestinal tract, which are chronic in course and are associated with abnormal bowel movements, including black stools, or unformed stools, as well as significant loss of appetite and weight loss, and if necessary, further examination with colonoscopy or abdominal CT.