White tongue and bad breath are often thought to be a sign of internal heat, but Chinese medicine believes that a white tongue is not necessarily the cause of disease, but may be caused by the imbalance of several organs in the body, white and greasy tongue and bad taste in the mouth, most often due to heat in the lung and stomach. Chinese medicine believes that the odor of the mouth should be based on clearing the heat of the lung and stomach, can use bamboo leaf gypsum soup, clear lung soup and other additive treatment, do not eat seafood, hair, spicy stimulating and indigestible food during the medication. The diet should be light. When brushing the teeth, you can brush the tongue appropriately to remove the influence of the odor of the tongue. If the symptoms persist without improvement, you need to find a Chinese medicine practitioner for identification and treatment. In addition to the heat of the lung and stomach, if the tongue is thin and white and moist, it is a wind-cold symptom, while a thin, white and dry tongue is a wind-heat symptom. If the tongue is white, thick and slippery, it is caused by excessive dampness or food accumulation, and if the tongue is thick and greasy like accumulated powder, it is caused by heat toxicity, which is mostly seen in plague. In addition to symptomatic treatment, we should also maintain oral hygiene and prevent oral diseases, and follow the doctor’s instructions to take medication.