A nasogastric tube usually means a nasal feeding tube, so a nasal feeding tube is a type of insertion of a gastric tube, and there is no essential difference between the two. The gastric tube usually enters the nasal cavity through the nostril on one side of the patient, and then slowly enters the esophagus after the tube reaches the epiglottis, with a depth of insertion of usually 45-55 centimeters and a total length of about 105 centimeters. Gastric or nasal feeding tube insertion is usually used for patients who are unable to eat by mouth, such as chronic coma, dysphagia, oral surgery, etc. Gastric tube insertion can be done as prescribed by the doctor in order to replenish the nutrients needed by the body. However, the insertion of gastric tube or nasal feeding tube usually causes some damage to the mucous membrane of the oral cavity and nasal cavity, so it should be removed as soon as possible when the patient’s condition gradually improves to avoid serious damage to the mucous membrane causing bleeding. After inserting the gastric tube, care should be taken to avoid folding, and saline rinsing should be done in time after injecting food every day to prevent the gastric tube from being blocked by food residues.