Gastroscopy can not only accurately examine and diagnose diseases, but also perform microscopic sampling biopsy and treatment, etc. How long can we eat normally after the examination is related to a variety of factors. If you simply do gastroscopy without endoscopic treatment, and there is no abdominal pain and other symptoms after the examination, you can generally have a liquid diet after 2-4 hours, and return to a semi-liquid diet or normal diet after 24-48 hours. However, attention should also be paid to eating small and frequent meals, with a light and easily digestible diet. If endoscopic treatment, such as mucosal biopsy and polypectomy, is performed at the same time as gastroscopy, the recovery time of diet will be relatively longer, and it may take 3-5 days to return to normal diet. After gastroscopy, patients should avoid strenuous exercise and observe the color of the stool. Once abnormalities such as blood in the stool or tarry stool occur, they should seek prompt medical attention from the gastroenterology department.