A cold, if accompanied by a fever, is mostly caused by bacterial or viral infections. Under the guidance of a doctor, active symptomatic treatment can usually reduce the fever within two to three days. It is recommended that during the fever period, one should monitor the body temperature closely. If the temperature exceeds 38.5°C, fever-reducing medication should be taken immediately to achieve the purpose of reducing the fever, to avoid febrile convulsions, especially in infants and young children whose nervous systems are not yet fully developed. If a high fever is not treated promptly, it could likely lead to febrile convulsions and may have a certain impact on the child's health. Therefore, it is advised to take fever-reducing medication in a timely manner. If the body temperature is below 38.5°C, physical cooling methods can be used at this time. Let the baby or the patient drink more water to promote excretion and enhance their resistance. Physical cooling methods should also be used regularly.