How to treat mouth ulcers in a 6-year-old child?

For oral ulcers in a 6-year-old child, the following measures are recommended: 1. Maintain oral hygiene: Teach the child to brush teeth in the morning and evening, and rinse the mouth after meals to reduce oral bacteria and prevent secondary infection. 2. Adjust diet: Encourage a light diet with fresh vegetables and fruits rich in B vitamins, such as spinach, celery, and apples. Avoid spicy and irritating foods, such as chili peppers and garlic, to reduce irritation to the ulcerated area. 3. Local treatment: If the ulcer is painful, under a doctor's guidance, apply topical anti-inflammatory and pain-relieving medications, such as watermelon frost spray or Bingpeng powder, to promote healing. 4. Enhance immunity: Encourage the child to engage in appropriate physical exercise to strengthen the immune system and reduce recurrence of oral ulcers. Parents should closely monitor the child's condition and seek medical attention promptly if necessary.