Whether a patient with gastroenteritis should have a colonoscopy depends on the specific condition. In the case of patients with acute gastroenteritis, colonoscopy is not required. This is because acute gastroenteritis, in most cases, is caused by improper diet. It is self-limiting, gastroenteritis appears abdominal pain, diarrhea, vomiting, etc., about 3-5 days can be completely cured, so there is no need to perform colonoscopy. If a patient with chronic gastroenteritis has recurrent abdominal pain, accompanied by nausea, vomiting, and stool changes, it is necessary to perform an e-colonoscopy to help understand the specific intestinal mucosal lesions. It is also necessary to perform an electronic gastroscopy to understand the specific lesions of the upper gastrointestinal tract. Acute gastroenteritis may not require colonoscopy, but it is necessary for patients with chronic gastroenteritis to undergo colonoscopy. If the colonoscopy does reveal organic lesions, medication should be given under the guidance of a specialist.