Gastroenterology is the department of gastroenterology for intestinal examination. Intestinal examination is mainly based on rectal finger examination, colonoscopy and ultrasound examination, which can examine the rectum and colon of patients to find out whether there is inflammation, ulcer and tumor in the intestinal mucosa, and since the intestinal system is a disease of gastroenterology, it is necessary to register with the Department of Gastroenterology when conducting the examination. For patients with long-lasting intestinal diseases, colonoscopy is the main procedure. Since colonoscopy needs to be performed in a fasting state, you should prepare well in advance and eat mainly liquid or semi-liquid food a few days before the examination. The results of the colonoscopy will be available in about half an hour. For patients with intestinal tumor disease found after colonoscopy, the disease should be treated as soon as possible.