Growing children need nutritious food, and the body needs nutritious food to fight disease, but the digestive system is somewhat affected during illness. The contradiction between the body’s need for more nutritious food and the child’s inability to eat at all can be a real source of anxiety for many parents. Whether it’s fever, diarrhea, vomiting, or coughing and sniffling ……. During illness, the child’s digestive system is weakened, so it is important to give the child nutritious food that is easy to accept, easy to digest, and the following principles can be considered (unless the illness has specific contraindications): Liquid and semi-liquid foods should be given priority. Both children and adults generally prefer liquid foods to regular foods during illness. Smaller children who have not started complementary foods should drink as much milk as possible; babies in the complementary food stage should drink more milk and increase the intake of plain water and rice porridge; older children should drink more light soups in addition to the above. Foods that can prevent dehydration should be given priority. Increase the intake of fresh fruits and vegetables, and make purees or even juices according to your baby’s needs. Babies usually don’t like oral rehydration salts, so freshly squeezed apple juice can be used instead to prevent dehydration or mild dehydration (note that it is not commercially available fruit juice!). . For moderate dehydration and above, seek medical attention as soon as possible and the doctor will take the necessary rehydration measures. Nutritious foods that your child likes should be given priority. It is especially important to respect your child’s appetite when his or her appetite is reduced due to illness. Give up giving your child foods that you think are nutritious but that he does not want to eat, or if he only wants to drink some milk and eat a little banana. Do not try to continue adding new complementary foods during illness. During illness, the digestive system is weakened and the body may be in a state of hypersensitivity, so new foods can easily trigger allergies and other illnesses. Eat small, frequent meals and avoid eating large amounts of food and foods that are not easily digested. Most diseases do not require additional special food supplements, and it is time to give the digestive system a proper rest and adjustment. Don’t force it, even if your child hasn’t eaten for twenty-four hours. Your child will eat according to his or her needs, and his or her appetite will gradually improve once he or she recovers. In fact, the child will make up for the “meals” missed during the illness in the period after recovery, i.e., the child will regain the nutrients lost soon after recovery.