It is not necessary to eat a liquid diet for two days after a gastroscopy. Gastroscopy is a relatively common examination of the digestive system that uses a thin, flexible tube that goes from the mouth deep inside the stomach and allows for observation of lesions in the esophagus, stomach and duodenum. After a gastroscopy, you can usually drink a moderate amount of water 2 to 4 hours later. After drinking water if there is no obvious discomfort can gradually eat, mainly liquid food, such as soybean milk, thin rice, etc. 4 ~ 6 hours later when eating the next meal, you can eat a normal diet. For patients who have gastroscopy for biopsy, they can usually drink water moderately after 4 hours, and can eat liquid food moderately if there is no obvious discomfort after drinking water. The diet on the day of the examination is mainly easy-to-digest fluids and semi-fluids as much as possible, and if there is no obvious discomfort, you can have a normal diet on the next day. There is no strict clinical requirement to eat fluids for two days after gastroscopy, so do not believe in the so-called gastroscopy must eat fluids for two days. If there is endoscopic treatment, according to the size of trauma and bleeding, the doctor will decide the time of fasting and the type of diet. The precautions after having a gastroscopy are recommended to be strictly adhered to by the patient, and the patient is advised to seek medical treatment in time if any uncomfortable symptoms occur.