Consider the tongue thick white is due to poor oral hygiene, cold and dampness, dietary disorders and other reasons, the specific situation should also go to the hospital in time for examination to confirm. 1. Poor oral hygiene: not to develop the habit of brushing or gargling, so that the teeth and the tongue surface retains a lot of food debris, long-term, will form a layer of soft dirt on the surface, there will be a thick and white tongue, and accompanied by bad breath symptoms. 2. Cold and dampness: If the patient is in a cold and damp place for a long time, it will become phlegm (a pathological product formed by water metabolism disorder) and dampness and turbidity, and the symptom of thick and white tongue coating will appear. 3. Dietary disorders: when dietary disorders injure the spleen and stomach, so that the spleen and stomach transportation and metabolic function is abnormal, so that moisture is stored in the gastrointestinal tract for a long time, can not be discharged from the body, which can lead to the symptoms of thick white tongue. There are many reasons for white tongue, so it is recommended to consult a doctor in time to clarify the cause of the disease and carry out targeted treatment as soon as possible.