There are standards for watery stools before colonoscopy, which should be watery or light yellow and without fecal sludge in the stool. Enteroscopy is an examination method that inserts the enteroscope into the ileum through the anus to observe colonic lesions. It is suitable for examining unexplained lower gastrointestinal bleeding, abnormal bowel movements, etc. It can also be used to exclude diseases of the large intestine or the end of the ileum, abdominal masses, etc. Before the examination, patients should take oral purgative medication (such as polyethylene glycol electrolytic powder, etc.) as prescribed by the doctor. Before the examination, patients should take oral intestinal cleansing medication (e.g., polyethylene glycol electrolyte powder, etc.) as prescribed by the doctor, and after taking the medication, they should drink more water until the discharged stools are clear water or light yellow and without fecal sludge, so as to facilitate observation of the situation in the intestines. After the examination, the patient should pay attention to observe the color of the stool, and inform the doctor immediately if there is bloody stool, abdominal pain, or elevated body temperature.