Enteroscopy is fine, which means that no ulcers, polyps, tumors and other organic intestinal lesions visible to the naked eye are found in the intestines by enteroscopy, but there is still mucus, pus and blood in the stools which may be caused by mild enteritis, gastrointestinal dysfunction and other factors. 1. Enteritis: enteritis is often caused by infection, immunity, radiotherapy and other factors, patients may appear mucus, pus and blood stools, which may also be accompanied by abdominal pain, nausea, vomiting and other symptoms. Mild enteritis can be normal through enteroscopy. The symptoms can be relieved through dietary regulation and symptomatic treatment. 2. Gastrointestinal dysfunction: Gastrointestinal dysfunction is a kind of functional gastrointestinal disease caused by physiological, psychological and social factors, and enteroscopy is usually normal, but because of mucosal edema, mucopurulent blood stools, abdominal bloating, diarrhea and other symptoms can occur repeatedly. Patients can take intestinal probiotics such as Bifidobacterium or Lactobacillus to regulate appropriately. Mucus stool with blood may also be caused by other reasons, if the symptoms are not relieved or continue to aggravate, should be timely to the hospital for consultation, although the colonoscopy is normal, but also should be further stool routine and other tests, to identify the cause of the cause of the disease by the specialists to take the appropriate medication for the cause of the disease and symptomatic treatment and other methods.