The Yellow Emperor said: Before diagnosing a disease, you must first ask the patient about his life. If the patient used to be in a noble position and became humble after losing power, such patients often feel humiliated and depressed. Although he is not attacked by external pathogens, diseases will also arise from the body. This disease is called "leaving camp";

If patients become rich first and then poor, they will often be influenced by diet and emotions, thus producing a disease called "nocturnal emission".

Extended data:

Huangdi Neijing is divided into Lingshu and Suwen, which is the earliest medical classic in China and one of the four classic works of traditional medicine (the other three are Difficult Classic, Treatise on Febrile Diseases and Shennong Herbal Classic).

Huangdi Neijing is a comprehensive medical work, which establishes the theories of Yin and Yang, five elements, pulse condition, Tibetan image, meridians, etiology, pathogenesis, symptoms, diagnosis, treatment, health preservation and luck.

It presents a "holistic medical model" of nature, biology, psychology and society (according to modern scholars' research, it is considered that the traces of Huang family in this edition are invaded by Taoist priests in Sui and Tang Dynasties). Its basic material comes from the long-term observation of life phenomena in ancient China, a lot of clinical practice and simple anatomical knowledge.