Nasogastric tube can be seen in head and neck pharyngeal major surgery, pharyngeal cancer and other diseases; cerebrovascular disease, coma and other diseases that cannot swallow on their own; digestive system diseases and so on. 1. Major head and neck pharyngeal surgery, pharyngeal cancer: when patients undergo major pharyngeal surgery or pharyngeal cancer, the muscles of the pharynx are damaged and they can’t swallow food through the contraction of the muscles, but they are conscious, so they can send the food to the stomach through the nasogastric tube to be digested and absorbed, and the pressure on the muscles of the pharynx can be reduced. 2. Cerebrovascular disease, coma: cerebral hemorrhage, cerebral infarction and other diseases may involve damage to the upper motor neurons, resulting in swallowing obstacles in the throat, unable to eat normally; coma patients do not have independent consciousness, can not independently complete the swallowing action, both of which require nasal feeding tubes to help the patient to send food to the stomach and duodenum to maintain the life of the essential nutrients. 3. Digestive system diseases: perforated gastric ulcer, gastric resection and other conditions, in order to reduce the pressure and stimulation of food on the stomach, nasal feeding tube can be used to send food to the duodenum to replenish the energy needed for life, pay attention to the nutritional balance, the temperature of the food and the speed of injection, or else it will cause abdominal pain, diarrhea and other symptoms. Pay attention to the smoothness of the nasal feeding tube in daily life, if blockage or rupture occurs, go to the hospital for timely replacement to ensure the quality of life of the patient, and do not be negligent, so as not to cause delays in the condition of the patient.