The causes of fire are the following: 1, may be due to seasonal factors, such as summer is hot, the heart fire is more vigorous, very easy to appear the symptoms of fire, such as irritability, mouth and tongue sores, urine short red, etc. 2, due to emotional factors may also lead to fire, such as heart and liver fire or irritability is very easy to lead to fire. The human body can also lead to fire in the liver qi stagnation, liver up too much will also lead to liver qi rebellion and symptoms of fire. 3, dietary factors are also the main cause, such as often eat spicy and stimulating food and greasy food, eat a lot of chili or other hot and spicy food may lead to fire. 4, may also have a relationship with the social environment, such as work pressure is relatively large, often stay up late, social networking led to The heart and kidneys do not cross, kidney water deficiency and the symptoms of fire. So there are many reasons for the above analysis of the fire, according to the specific situation under the guidance of doctors with medication.