A 4-year-old child with fever and cold feet needs to be treated for the cause of the fever by choosing either physical cooling or medication to reduce the fever depending on the degree of elevation of the baby’s temperature. A 4-year-old child with fever and cold feet indicates that the child’s body temperature rises too quickly, resulting in too much heat dissipation from the body surface. You need to pay attention to the feet to keep warm, give rubbing heat or use a warm water bag to keep warm locally. When the body temperature <38.5 ℃ can be used to apply warm water to the child's forehead, reduce the wearing of clothing and other physical methods of cooling, encourage the child to drink more water, some children's body temperature can gradually decline; when the body temperature ≥ 38.5 ℃ also need to use antipyretic drugs under the guidance of the doctor, such as ibuprofen, acetaminophen, etc. for antipyretic treatment. The most common cause of fever is infection. For respiratory infections caused by bacterial infections, antibacterial medications such as cefaclor and cefdinir should be used aggressively to fight the infection. For influenza virus infection, antiviral treatment with oseltamivir phosphate is required. All of the above drugs should be used under the guidance of a doctor, avoid self-medication. There are many causes of fever in a 4-year-old child, and it is recommended to seek prompt medical attention and be evaluated and treated by a specialist.