When babies get cold, they are prone to diarrhea because their body resistance is reduced and their gastrointestinal function is affected. Typical clinical manifestations are diarrhea, nausea, vomiting and abdominal pain, or accompanied by fever. The most important treatment for cold-induced diarrhea is to replenish water and electrolytes to prevent dehydration in infants. As soon as the diarrhea starts, adequate oral fluids should be given and the child should continue to be fed. The following methods can be used: (1) Oral rehydration salts (ORS): after each diarrhea, 50-100ml orally for under 2 years old, 100-200ml orally for 2-10 years old, and as much as you can drink for those older than 10 years old. It can also be given at 40-60ml/kg, immediately after the start of diarrhea. (2) Rice soup with salt solution: 500ml of rice soup + 1.75g of fine salt or 25g of fried rice flour + 1.75g of fine salt + 500ml of water boiled for 2 to 3 minutes. The dosage is 20～40ml/kg, 4 hours to finish, and later on, give as much as you can drink orally at any time. (3) Sugar and salt water: 500ml of boiled water + 10g of cane sugar + 1.75g of fine salt. the dosage is the same as that of rice soup with salt solution. If the vomiting or diarrhea lasts for a long time or there is serious dehydration, it is necessary to carry out intravenous rehydration. Anti-emetic drugs can be added in case of severe vomiting. If the diarrhea lasts for more than 24 to 48 hours and there is no indication of bacterial infection, antidiarrheal medication may be added.