The human gastrointestinal tract is 8-10 meters long from the mouth to the anus, of which the small intestine is 6-8 meters long, which has been a blind spot for endoscopy due to its distance from the mouth and anus, deep location, and folded and coiled; thus, many small intestinal diseases are difficult to be diagnosed. In order to solve the diagnostic problem of small intestine diseases in our city, our hospital exclusively introduced capsule endoscopy, which realized the endoscopy of the whole gastrointestinal tract, especially the small intestine, for the first time. Capsule endoscopy can be understood as a disposable high-definition digital camera, which mainly consists of a miniature camera lens, a light-emitting tube, a battery and a computer microchip. It is similar in size to an ordinary drug capsule and can be swallowed like a pill. During the examination, the capsule endoscope swallowed by the patient moves forward in the body by the peristaltic movement of the gastrointestinal tract, while taking pictures continuously at a frequency of several images per second. Then, through a special image receiver worn from the patient’s waist to receive image information, the received information will be downloaded, and the computer comprehensive analysis to reach a diagnostic conclusion. It is painless, non-invasive, easy to operate, and has unique diagnostic value for small intestine diseases, especially for unexplained gastrointestinal bleeding. Indications for capsule endoscopy Unexplained gastrointestinal bleeding. Small bowel imaging abnormalities suggested by other tests. Various inflammatory bowel diseases. Unexplained abdominal pain, diarrhea, anemia. Small bowel tumors (benign, malignant and carcinoid tumors). Contraindications to capsule endoscopy Patients with confirmed (or suspected) gastrointestinal obstruction, strictures or fistulas and large diverticulae based on clinical imaging or other examinations. Patients with other medical devices such as pacemakers in their bodies. Pregnant women and infants. Those with severe swallowing difficulties. Capsule endoscopy Endoscopic hemostasis of GI bleeding (varicose vein ligation, sclerosing injection, tissue gel injection, etc.). Endoscopic treatment of digestive tract tumors (polypectomy, ligation, microwave cauterization, mucosal resection (EMR), etc.). Duodenoscopic treatment (papillotomy, nasobiliary drainage, biliopancreatic stenting, etc.).