Qi And Etiology Of The Pre Qin And Han Dynasties

The concept of Qi originated in prehistoric period,and gradually developed into the basic theory to explain everything in the world from the Spring and Autumn period to Han Dynasty.The human body in the world is generated by Qi.The technique of looking at Qi,which uses Qi as the divination object,is also widely used in agriculture,war and fate prediction.The theory of external cause in the view of etiology of doctors can be traced back to the spring and Autumn period.It refers to the damage caused to the body by the external climate change,which is the result of the drastic change of the Qi of heaven and earth invading the Qi of human body.The theory of internal cause can be traced back to the Warring States period.It mainly refers to the diseases caused by bad emotions,which are produced in the human body and pathological changes occur by damaging the Qi of the human body.Qin and Han Dynasties,the theory of external cause and internal cause became the mainstream of medical literature,and had a profound impact on the social culture at that time.As another tradition of etiology,the theory of surreptitious diseases can be traced back to the Shang Dynasty,and it can be traced back to the Han Dynasty.Shen Nong’s herbal classic,which has been handed down from generation to generation,refers to "evil spirit" as a general term,which mixes the disease with external causes.Since then,the disease has been officially included in the etiology theory of doctors,and this etiology can also be expressed through Nuo ceremony.