Most patients are more fearful of gastroscopy because they are afraid that performing a gastroscopy may delay the treatment of their condition. Gastroscopy is by far the preferred treatment method for diagnosing upper gastrointestinal tract diseases. It is like a doctor’s eye that enters your body and observes your gastrointestinal mucosa with a magnifying glass. The widespread use of gastroscopy + mucosal staining and NBI (narrow spectrum light analysis) technology has led to a much higher diagnosis rate of early gastric and esophageal cancers, which can be completely cured at an early stage by surgery or endoscopic surgery. Therefore, gastroscopy is very important. The following are the precautions for gastroscopy: 1. After you have made an appointment for gastroscopy, eat a liquid diet in the afternoon of the day before the examination, brush your teeth in the morning of the examination, do not eat anything, including water and drinks, milk is prohibited, wear loose clothes, and come to the hospital on foot or by car (because you cannot drive after anesthesia for painless gastroscopy). 2. About 5 minutes before the examination, the nurse will give you an anesthetic, which is used for pharyngeal anesthesia, about 10ml, and swallow it after holding it in the back of the throat for about 20 seconds. You will feel the stiffness of the throat, this is the effect of anesthesia, it will reduce the nausea during the endoscopy. 3, when the nurse calls you for the second time, it’s time for you to check, first of all, you should not be afraid of gastroscopy, now the larger hospitals gastroscopy are very thin, only about 8mm. After you enter the examination room, give your case information to the examining doctor (this will make the doctor more purposeful, some patients will think, I first give it to the doctor, the doctor will only look at this point, the other will not see, and then give him after the examination, in fact, this is very wrong, because the doctor in the examination process, will use the average attention to observe every inch of the digestive tract mucosa, if you tell the lesion in advance, he will be more attention, whether the lesion has changed or not, which is very different from knowing the previous medical history after the examination and then relying on the memory to compare with the previous one, the result of which will help you a lot.) After anesthesia, when the doctor enters the throat, you do a little swallowing, the endoscope can enter the esophagus la, and then during the examination you keep normal breathing, do not swallow saliva (swallowing saliva will cause a poor view of the stomach, affecting the speed of the examination; and then may occur choking), the better you cooperate, the shorter the examination time may be, the doctor see more clearly, will reduce a lot of pain. 4.After the examination, wait patiently outside the examination room for the examination results. For general examination, without biopsy, you can have a small amount of liquid diet after the stiffness in the throat completely disappears, if biopsy is done, you need to wait for 2 hours to have a liquid diet. 5.Go home by car or on foot.