1. Principles of Diet Therapy Diet therapy refers to methods of improving physical health through dietary conditioning. For babies with cough and runny nose, we can use some dietary treatments to relieve the symptoms. However, it should be noted that dietary therapy cannot completely replace drug treatment and should be carried out under the guidance of a doctor. 2. Clearing the lungs and resolving phlegm 1. Snow pear paste Snow pear paste is a food that is very suitable for babies. It can clear the lungs and resolve phlegm, moisten the lungs and relieve coughs. Peel and cut the pear into pieces, add water to a pot and bring to a boil, then add rock sugar, then lower the heat and slowly reduce the juice. 2. Orange Orange