Yin-Yang and Pathology

 

Any damage to the dynamic balance between yin and yang of the body leads to various diseases.

For example, summer-heat is a yang pathogen, when one is attacked by it, he has the following symptoms: fever with restlessness, sweating and thirst.  It is an example of excessive yang heat impairing yin fluid.  Take a patient with chronic nephritis as another example.  He often suffers from edema and aversion to cold.  This is due to excess of yin leading to relative deficiency of yang.