What should be done for a child's mouth ulcer and thick white tongue?

1. When a child develops oral ulcers along with a thick white coating on the tongue, attention should be given to the child's diet and oral hygiene. Parents are advised to encourage the child to consume bland, easily digestible foods, and avoid spicy, greasy, or irritating foods to reduce irritation to the oral mucosa. At the same time, children should be encouraged to brush their teeth in the morning and evening to maintain oral cleanliness and prevent bacterial growth. 2. For oral ulcers, parents may administer Kehoujian Spray according to medical advice to help reduce inflammation, relieve pain, and promote healing of the ulcers. In addition, anti-inflammatory medications such as Roxithromycin Capsules or Amoxicillin Capsules may also be considered, but must be used under the guidance of a physician. 3. A thick white coating on the tongue may be related to spleen and stomach weakness or indigestion. Parents are advised to administer spleen-strengthening and digestion-promoting medications to the child according to medical guidance, such as Shenling Baizhu San or Jianwei Xiaoshi Pian. Attention should also be given to dietary adjustments, including the consumption of foods that support spleen function, such as Chinese yam and coix seed.