You can’t drink water before gastroscopy, because drinking water will cause the color of the gastric mucosa to change, affecting the accuracy of the test results. You also need to pay attention to the following points before doing gastroscopy: 1, at least 6 hours fasting, if you want to do gastroscopy today, you can’t eat any food or drink water after zero o’clock today. 2, adjust your mood, don’t be too nervous to avoid stomach peristalsis too fast, although the ordinary gastroscopy will have a little bit of discomfort, it is a good method of checking the gastric diseases, don’t need to be too afraid. Now there are painless gastroscopy methods, the discomfort will be no feeling, if the esophagus is particularly sensitive, you can choose this method. Don’t eat immediately after gastroscopy, you can eat some fluids after 2 hours, there will be a little discomfort in 96 hours after gastroscopy, if it affects the normal life, you can take coral tablets to relieve it.