When a child has a mild fever due to a cold, it is often likely caused by a viral infection. In this case, it's important to monitor the child's temperature. Initially, physical methods to reduce fever can be adopted, such as encouraging the child to drink more warm water, giving warm water sponge baths, or bathing in warm water. Additionally, appropriate oral antiviral medications and some traditional Chinese medicines, such as those that clear heat and detoxify, can be administered. It is also vital to observe the child's behavior and check for symptoms like coughing, vomiting, runny nose, or diarrhea.