The baby has caught a cold. Considering that the baby’s organs are not fully developed and their immune response is weak, even a common cold can easily lead to new viral infections or bacterial infections, raising the possibility of severe diseases such as pneumonia. Therefore, when a baby has a cold, it is best to take them to the hospital’s pediatric outpatient clinic for a timely examination and assessment, and to receive active treatment based on the cause. If it is inconvenient to visit the clinic, since most colds are caused by viruses such as respiratory or enteric viruses, you could consider taking some antiviral traditional Chinese medicine at home, as well as some symptomatic treatment medications targeting cold symptoms. Of course, attention must also be paid to dietary management, as the digestive function decreases during a cold. Therefore, it is advisable to eat small, frequent meals and avoid foods that are hard to digest or likely to cause allergies, in order to not exacerbate the child's symptoms. (The use of medications should be under the guidance of a doctor.)