Children’s diarrhea can be seen in gastrointestinal infections, lactose intolerance, etc., there is no unified method of what to eat to get well faster, need to give reasonable treatment according to the cause, such as suspected bacterial infection need to be appropriate anti-infective, the use of intestinal mucosal protective agents, etc.. 1. Gastrointestinal infections: often caused by viruses (e.g. rotavirus) or bacteria (e.g. Escherichia coli), etc., with increased stool frequency or obvious changes in character, which may be accompanied by vomiting or fever symptoms. If bacterial infection is suspected, antibacterial drugs (e.g., cefaclor) should be used for anti-infective treatment, and oral intestinal mucosal protective agents (e.g., montelukast) and microecological agents (e.g., Saccharomyces boulardii) should be taken, and supplemental oral rehydration salts should be given if dehydration exists during the course of the disease. 2. Lactose intolerance; due to the relative or absolute lack of intestinal lactase for various reasons, diarrhea and bloating may occur after eating dairy products. Treatment can be oral lactase treatment, for younger infants need to use lactose-free milk powder if necessary. 3. Milk protein allergy: more common in infants, diarrhea symptoms can occur, some accompanied by bloody stools, such babies may have eczema, etc., the treatment needs to be appropriate use of hydrolyzed protein formulas, breastfeeding mothers need to avoid eating eggs and other foods. The above medications should be used under the supervision of a physician, and it is recommended to actively seek medical attention and evaluation by a specialist physician for appropriate intervention.