The causes of dry lips are exogenous evil, heat disease and environmental factors. External evil is mostly seen in external wind heat or wind dryness, heat disease injury to the body is mostly seen in yin deficiency and fire (Yin essence deficit in the body, the emergence of excessive fire), liver fire blazing, and so on. However, the specific circumstances when under the guidance of a professional physician, diagnosis and treatment. Wind-heat or wind-dryness evil often enters the mouth, nose or body surface, injuring the lung fluid, then see the mouth and lips dry. The spleen opens the orifices of the mouth, and its splendor is in the lips. If the spleen and stomach have insufficient yin and fluid, and the deficiency fire is overflowing, then the mouth and lips will be dry. Then there is a liver fire blazing person, the fire can be reversed in the head and face through the meridian or dry and lungs, frying yin liquid, and then appear dry lips and mouth. The climate, geographical location and other factors can also lead to dry lips. In addition to dry lips and mouth, wind-heat people and common fever and sweating, nasal discharge and other symptoms; wind dryness injury to the lungs and common dry cough with little sputum, or with blood, as well as thirst and other symptoms; yin deficiency and fire and common sleep sweat, waking up since the end of the symptoms; liver fire is common and common impatience and irritability, red face and eyes red and other symptoms. It is recommended that patients consult a doctor in a timely manner in order to clarify the cause of the disease and take targeted treatment.