It is not recommended to eat egg custard when a child has diarrhea, because egg custard contains a lot of high protein. When the digestive function is already significantly weakened during diarrhea, the intake of a large amount of protein increases the burden on the digestive function, thus leading to an aggravation of diarrhea, so it is recommended to eat less or not. In addition, it is also necessary to reduce high-fat and high-cholesterol foods because they are relatively difficult to digest. The diet should be based on liquid and easily digestible foods, which can help improve the patient’s diarrhea symptoms and effectively replenish water and electrolytes to prevent water-electrolyte disorders from occurring due to diarrhea. In addition, it is also important to eat less flatulent food, no sweets, no excessively cold food, and indigestible food, mainly to give further food additions after the diarrhea symptoms have improved, and also to promptly address the cause of diarrhea.