After gastric lavage, light, easily digestible food should be the main focus. Fasting should be done within 24 hours after gastric lavage, and after 24 hours, you can eat fluids and semi-fluids first, and then slowly transition to normal diet. Gastric lavage can cause some damage to the gastric mucosa, it is not recommended to eat within 24 hours after gastric lavage, including water, to avoid stimulation of gastric mucosa by food and water. After 24 hours of gastric lavage, you can start with liquid food, such as drinking water, vegetable juice, fruit juice, etc.; then go to semi-liquid food, such as white porridge, millet porridge, noodles, etc., and then slowly transition to a normal diet. It is recommended that the diet is based on light, easy-to-digest foods. After gastric lavage, you can consult a professional physician and receive dietary guidance from the doctor. If there is discomfort after gastric lavage, you can follow up in time to avoid delaying the condition.