What should I do if a child has mouth ulcers, vomiting, and fever?

When children develop symptoms such as oral ulcers, vomiting, and fever, parents should first remain calm and consider the possibility of oral infection or inflammation caused by herpes simplex virus, bacteria, or other factors. To address these symptoms, the following measures are recommended: 1. Physical cooling: If the child's temperature does not exceed 38.5°C, use a warm, damp towel to wipe areas such as the forehead and armpits to help reduce body temperature. Encourage the child to drink more warm water. 2. Medication: If the temperature exceeds 38.5°C, antipyretic medications such as ibuprofen suspension may be used under a doctor's guidance. If symptoms are caused by a viral infection, antiviral medications such as ribavirin granules may be considered. For oral ulcers, medications such as stomatitis spray or watermelon frost can be used to relieve symptoms. 3. Dietary adjustment: Avoid spicy, irritating, and cold foods. Consume more fresh vegetables and fruits, and maintain a bland diet. 4. Daily care: Maintain good oral hygiene by rinsing the mouth after meals, using a soft-bristled toothbrush to brush teeth, and avoiding irritation of the ulcerated areas. If symptoms persist or worsen, it is recommended to seek timely medical attention for diagnosis and treatment by a qualified physician.