After narrowing of the intestinal lumen, patients’ clinical symptoms are related to the degree of narrowing of the intestinal lumen, mainly manifested as abdominal pain, abdominal distension, nausea, vomiting, as well as stopping of anal defecation and bowel movement. In mild cases, patients may only have symptoms such as abdominal distension and belching. As the degree of intestinal stenosis increases, the abdominal distension further worsens. The process of intestinal peristalsis stimulates the patient to experience abdominal pain and manifestations such as nausea and vomiting. When the intestinal lumen is completely blocked, it evolves into intestinal obstruction, and the patient may experience symptoms such as anal cessation of gas evacuation and defecation. The narrowing of the intestinal lumen has more factors, and is associated with trauma, abdominal adhesions, tumor lesions, and lesions in other tissues and organs within the abdominal cavity. When the intestinal lumen becomes narrow, the intestinal contents cannot pass through the intestines smoothly, which may induce a series of clinical symptoms in patients. Therefore, it is necessary for patients to be vigilant and seek medical attention as soon as possible after the onset of symptoms of narrowing of the intestinal lumen. Combined with medical history, abdominal examination, ultrasound, CT, gastroenteroscopy and other examination items, comprehensive analysis to confirm the diagnosis of the cause of the disease, and then targeted treatment.