Doing small colonoscopy needs hospitalization, before doing small colonoscopy need to follow the doctor’s instructions for relevant preparations, therefore need to be hospitalized, after doing small colonoscopy patients will soon be awake, after being awake you can go home. Bowel preparation is needed before doing small colonoscopy, for example, liquid or semi-liquid diet should be taken one day in advance before the operation, bowel cleansing drugs such as polyethylene glycol electrolyte, magnesium sulfate, 25% mannitol should be used for 4-6 hours before the operation, and water should be forbidden for 4 hours before anesthesia, which are more complicated preparations and should be done in strict compliance with the doctor’s instructions, therefore, hospitalization is needed. In addition to the above intestinal preparation, because of the need to do small colonoscopy under anesthesia, so before the operation should also improve the electrocardiogram, chest X-ray, coagulation function and other tests, these preparations are more complicated, so need to be hospitalized. After the small colonoscopy, patients are usually awake very soon, after waking up 2 hours can not eat, the patient can not drive that day, should also avoid strenuous exercise, after observing that there is no discomfort, can be accompanied by family members to go home. Therefore, the people who are ready to do small colonoscopy, can consult a professional doctor in advance, make relevant preparations and other matters.