There is no strict dietary restriction for three days after gastroscopy, and it is not necessary to have to eat porridge, but light and easily digestible food should be the main focus. Gastroscopy is a test method that inserts the gastroscope along the esophagus into the stomach to check whether there are lesions in the gastric mucosa, which may cause some stimulation or damage to the gastric mucosa, especially for patients who take biopsies for pathological examination, which is relatively more damaging to the gastric mucosa. After gastroscopy patients should pay attention to diet, try to fluid or semi-fluid food, you can eat some millet porridge, rice porridge and other porridge food, but also can eat some rotten noodles, egg custard, fish, shrimp, green vegetables and other light, easy to digest food, do not need to have to eat porridge. However, it should be noted that patients should avoid cold and spicy stimulating foods such as chili peppers and cold drinks, as well as foods that are difficult to digest such as deep-fried oil, avoid drinking strong tea, strong coffee, etc., and also avoid eating nuts and other hard foods, so as not to irritate the gastric mucosa, which is not conducive to the recovery of the disease. Patients should also pay attention to observe whether there is abdominal pain and bloating, nausea, blood in the stool and other abnormalities after gastroscopy, if the symptoms persist or are more serious, it is recommended to consult a doctor in a timely manner, and actively accept the treatment, so as not to delay the condition.