Gastroscopy in the esophagus of the elderly to take out a lot of indigestible food to consider is not fully prepared for gastroscopy fasting, may also be pyloric obstruction, dyspepsia, esophageal cancer and other diseases caused by. Preoperative diet of patients need to suspend gastroscopy, re-appointment of gastroscopy, if it is caused by pathologic factors need to be under the guidance of the doctor for targeted treatment, including drug therapy, surgical treatment and so on. 1. Physiological factors: gastroscopy is usually required before gastrointestinal preparation, not fully prepared for gastroscopy before fasting, there will be a gastroscope in the esophagus to take out a lot of indigestible food, such cases of elderly patients need to be fasted for 6 to 8 hours before the gastroscopy, water fasting for 4 hours. 2. Disease factors: patients with pyloric obstruction need to fast, gastrointestinal decompression, accompanied by severe vomiting need to rehydration, but also the use of omeprazole, lansoprazole and other medications as prescribed by the doctor, esophageal cancer, scarring pyloric obstruction need to be considered for surgical treatment. Patients with dyspepsia can be treated with drugs such as mosapride and domperidone as prescribed by the doctor. Gastroscopy in the esophagus of the elderly to take out a lot of indigestible food if necessary, it is recommended to cooperate with the doctor active treatment.