White spots on the tongue localized irritation appear ulcer will appear pain. 1. White spot is a kind of oral mucosal disease, the etiological mechanism is unknown, may be related to local stimulation, bad dietary habits, to long-term smoking, chewing betel nut and other triggers. 2. White spots can occur in any part of the tongue, and the mucous membrane border is clear, slightly protruding mucous membrane surface, can appear hairy, cracked, chapped and other shapes, usually can not have any symptoms, local stimulation can be pain, ulceration, pain. Cod liver oil and vitamin A cream can be used to apply topically. 3. White spots belong to pre-cancerous lesions, usually pay attention to avoiding stimulation, and regularly observe the changes. When the white spots appear pain, ulcers and other symptoms, consult a doctor in time, under the guidance of the doctor for examination and treatment, to avoid delaying the condition, and the use of drugs need to follow the doctor’s instructions.