When wind evil intrudes upon the body, the qi becomes disordered, and the yin essence becomes dissipated. As a result, the evil impairs the liver. During this time, if one overeats, the sinews and vessels will become flaccid. Bloody and purulent in stool or hemorrhoid will ensue. If the patient drinks excess alcohol, the qi will become disordered. If the patient indulges in sexual activity, the kidney qi will be damaged and the spinal column will be undermined.
Key Words: discussion of vital-qi corresponding to heaven, in the plain questions
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