Whether gastroenteritis can eat fish needs to be judged according to the degree of the patient’s condition, generally gastroenteritis attack period should not be eaten, stabilization, recovery period can be appropriate to eat. 1. Gastroenteritis attack period: for gastroenteritis is still in the acute attack period of the patient, the digestive function of the gastrointestinal tract is not good, the gastric mucosa function is low, the patient can not be normal burden, so it is not recommended to eat fish. 2. Stabilization and recovery period: in the stabilization and recovery period of gastroenteritis patients, gastrointestinal function gradually return to normal, appropriate consumption of fish can also supplement energy and through the food supply of their own nutrition, improve the body’s immunity. If the diagnosis of gastroenteritis is confirmed and the symptoms are not relieved after lifestyle modification, it is recommended that standardized treatment be carried out as soon as possible to reduce the adverse effects of the disease.