Fire is what Chinese medicine calls a state of internal heat, which can be caused by a variety of reasons, such as dietary disorders, emotional disorders, and the feeling of external evil into the heat. 1. Dietary disorders: daily life, if you like to eat some spicy, fried, barbecue food or alcohol habits, easy to fire heat, and then the heat of the situation. 2. Emotional disorders: due to the usual life, work pressure or overwork and other reasons, easy to depression or irritability, impatience and other emotional disorders, emotional depression is not comfortable with the gas depression, gas depression for a long time will be turned into a fire, irritability and impatience is easy to lead to the liver fire, which can also cause heat within the situation. 3. Feeling the external evil into the heat: when the feeling of wind, cold, summer, dampness, dryness, fire and other diseases and evils, failure to treat or mis-treatment, resulting in the external evil not only from the outside and solution, but into the internal heat, the emergence of heat within the situation. It is recommended to consult a professional doctor in time.