Dryness can be divided into internal dryness, external dryness, the specific symptoms are not the same. Such as internal dryness is due to yin and blood deficiency can not nourish the internal organs and produce hot and dry symptoms; external dryness is divided into warm dryness, cool dryness, warm dryness manifested as body heat is not very dry cough without phlegm and other symptoms; cool dryness manifested as a headache, chills (fear of cold) without sweating and other symptoms. 1. Internal dryness is due to the deficiency of Yin and blood can not moisten the internal organs and produce the symptoms of dryness and heat, which can be manifested as dry mouth, dry throat, dry nose, dry eyes, dry skin, dry lips, dry stools, dry cough with little phlegm, five heart heat (two hearts and two feet of the heart of the heart fever, and consciously heart and chest heat), tongue red, moss thin and yellow, thin pulse (pulse narrowing and thinning and accelerated rate) and other symptoms. Internal dryness damages the body’s fluid, blood and yin essence, and internal dryness is mainly manifested as dryness of fluid, such as dryness of fluid and intestines, deficiency of gastric yin (deficiency of yin fluid in the stomach), and dryness of the lungs and injury of fluid, etc. External dryness is divided into warm dryness and warm dryness. 2. External dryness is categorized into warm dryness and cool dryness. Warm dryness manifests as body heat without much heat, dry cough without phlegm, sputum with little and sticky, dry throat and mouth, red tongue with little fluid, floating pulse and other symptoms; cool dryness manifests as headache, cold without sweating, cough with little phlegm, nasal congestion, white moss with stringy pulse and other symptoms. It is recommended that patients who are not feeling well should consult a doctor in time, and should not take medication blindly on their own to avoid delaying or aggravating their condition.