White spots on the tongue are caused by local irritants, local root remnants, crown remnants or poor restorations, and bad habits such as smoking, drinking spirits or eating spicy/irritating foods for a long time, or the habit of betel nut chewing. When white spots appear, you should go to the hospital for examination, and the lesions can be gradually reduced by applying vitamin A ointment. If there is no gradual reduction, it is recommended that surgical excision and pathological biopsy be done in a timely manner.