If a child has bad breath and symptoms of oral ulcers, these issues are mostly caused by poor gastrointestinal health. Parents should first take their child to a hospital for a detailed examination. If it is oral ulcers, then some vitamins can be supplemented for the child.

In their daily diet, they should eat more light and easily digestible foods, avoid heavy and spicy foods, and not eat junk food. It is better to eat more fresh fruits and vegetables.

(If medication is needed, please proceed under the guidance of a doctor.)