Children's colds and fevers are caused by viral or bacterial infections, with the vast majority being viral infections. First, we need to ensure that the child is well-hydrated and also manage the symptoms. When the body temperature exceeds 38.5 degrees Celsius, administer antipyretic medication to the child, such as ibuprofen suspension or acetaminophen. The interval between doses of these medications should be at least six hours. Additionally, give the child cold relief granules to alleviate the symptoms of the cold. When the body temperature is below 38.5 degrees Celsius, physical cooling methods can be applied, such as using fever-reducing patches, taking lukewarm baths, or wiping the forehead, neck, armpits, and groin—areas where large blood vessels are located—with a warm towel. Throughout the process, it is very important to keep the child hydrated. If the child's cold and fever persist, a complete blood count should be performed to check for a bacterial infection. If a bacterial infection is present, treatment with antibiotics should be administered under the guidance of a hospital doctor, based on the child’s condition. Controlling the infection is essential for reducing the fever and bringing the child's temperature down, ultimately helping the child return to normal.