What should be done for a 5-year-old child with mouth ulcers?

For oral ulcers in a 5-year-old child, parents can take the following measures to help relieve symptoms and promote healing: 1. Maintain oral hygiene: Encourage the child to brush teeth in the morning and evening, and rinse the mouth after meals, using a soft-bristled toothbrush and fluoride mouthwash to reduce bacterial growth and keep the ulcer clean. 2. Adjust diet: Choose soft, bland foods and avoid acidic, spicy, coarse, or overly hot foods that may irritate the ulcer. 3. Local treatment: If the ulcer is painful or large in size, topical medications such as oral sprays or mouthwashes may be used under a doctor's guidance to alleviate pain and promote healing. 4. Correct bad habits: Discourage habits such as lip or cheek biting to reduce injury to the oral mucosa. 5. Monitor and seek medical care: Closely observe the child's oral ulcer. If symptoms persist or worsen, timely medical attention should be sought for professional diagnosis and treatment. Please note that specific treatments should be based on the child's individual condition and medical advice.