Cough is one of the common symptoms of colds, and 4-year-old babies are more likely to develop a cough that requires active treatment because the mucous membranes of the respiratory tract may be more sensitive compared to adults. Most colds are caused by viral infections, and children with colds may experience typical symptoms such as elevated body temperature, nasal congestion, runny nose, cough, etc. At the same time, some children may also experience gastrointestinal symptoms such as diarrhea, etc. The treatment for children with colds is mainly symptomatic. The treatment for children with colds is mainly symptomatic. If the temperature is significantly elevated (over 38.5°C), intervention can be made with cooling medications such as acetaminophen. Although colds are self-limiting, in children, complications such as fever can lead to serious consequences such as convulsions, so prompt hospitalization is recommended. Medications need to be used under a doctor’s supervision.