Babies with colds and flu runny nose, mainly caused by wind and cold. Bacteria invade the mucous membrane of the nasal cavity, causing congestion and edema of the mucous membrane, thus increasing the secretion and causing the nasal mucus to become sticky. In addition, there will also be a lack of spirit and dislike of breastfeeding. If the nasal mucus turns yellow, it is considered to be a combined bacterial infection, and antibiotic drugs should be used at this time. During the period of treatment, the baby should be fed more water, if the temperature exceeds 38.5 ℃, it is recommended to use antipyretic suppositories, and intra-anal use of antipyretic treatment. If the fever is repeated, it is recommended to go to the pediatric outpatient clinic of the hospital for examination.