Fire in the mouth is a common disease of the mucous membrane of the mouth, lips and tongue edge, manifested as tongue pain, dry mouth, mouth ulcers, dry and cracked lips, inability to open the mouth, open lips dry bleeding; often recurring, but some patients will automatically heal. The causes of mouth fire are divided into two categories, one is yin deficiency and therefore yang Sheng, Chinese medicine said deficiency; such as staying up too late, too much stress, excessive anxiety, depletion of human yin and blood, kidney deficiency, etc., resulting in yin deficiency and fire, false fire on the inflammation and mouth and tongue sores, accompanied by dry throat, irritable heart and other symptoms; the other category is the actual evidence, that is, too much yang Sheng, such as if eating greasy, spicy food, resulting in the spleen and stomach transport function failure, spleen and stomach The other type of symptoms are real, i.e., Yang is too strong, such as eating fatty and spicy food, which leads to the failure of the spleen and stomach to transport and transform, the spleen and stomach accumulate heat, the stomach and intestines contain heat, and the heat becomes fire and attacks the mouth, which can also lead to sores on the mouth and tongue. Regular exercise, improve the body’s resistance, and keep a relaxed mood; avoid spicy stimulation, staying up late drinking alcohol and other actions that hurt the liver and stomach; choose vitamin-rich foods; regular living and avoid overwork, all of which are very good behaviors for mouth fire. If it does not heal for a long time, you can also go to the doctor to regulate the balance of the body. Finally, maintaining a good living condition, a healthy diet structure and adjusting your emotions are the best behaviors to prevent mouth fire.