A child’s fever and headache may be caused by a cold, often accompanied by coughing, phlegm, and fever. Fever can be determined by measuring body temperature, with a reading over 37 degrees considered fever. Treatment can include pediatric paracetamol and phenylephrine granules, drinking plenty of water, and keeping warm. In severe cases, intravenous treatment may be required. Additionally, it’s important to avoid irritating and cold foods, and maintain good hygiene habits.