All diseases are caused by the six exogenous factors, internal injuries, diet, work and rest

"Lingshu·Shun Qi Divides into Four Seasons a Day": "All diseases are caused by , must originate from dryness, dampness, cold, heat, wind and rain, yin and yang, happiness and anger, diet and residence." Ma Shi's "Lingshu Zhu Zhengfa Wei": "All diseases must start from external infections and internal injuries, so dryness and dampness. Cold, heat, wind and rain are caused by external factors; yin and yang, joy, anger, diet and living conditions are caused by internal injuries." "Lingshu·The Origin of All Diseases": "The onset of all diseases is caused by wind and rain. Cold and heat, clearing dampness and happiness and anger will harm the internal organs, wind and rain will harm the upper body, and clearing dampness will harm the lower body. "

Zhang Jiebin's "Three Volumes of Lei Jing·Disease Category 2": "All kinds of diseases." The origin is nothing more than external injury and internal injury, and it is divided into upper, middle and lower parts. It is also a disease of the five internal organs. Internal injury occurs in the internal organs, so it originates from yin deficiency, and yin evil originates from the outside. Down. Wind and rain hit the void, and the yang evil originates from the top."