What does Yin deficiency mean?

Yin deficiency generally refers to a series of pathological changes and syndromes caused by insufficient yin fluid, unable to moisten and unable to control yang. After

long-term emotional disorder, improper sexual intercourse, excessive use of warm and dry products or fever, serious illness and long-term illness, yin fluid can be consumed, resulting in deficiency of yin fluid, loss of moistening and nourishing of the body, so that yin does not control yang, yang heat qi is relatively vigorous and internal heat is generated, thus showing the syndromes of deficiency heat, dryness and restlessness. Yin deficiency syndrome can be seen in various organs, which can be divided into lung yin deficiency, heart yin deficiency, kidney yin deficiency and other syndrome types. Each syndrome type has different manifestations, such as lung yin deficiency can be manifested as dry cough without sputum or less phlegm and sticky, dry mouth and throat, thin body, hot flashes and night sweats, red tongue and less fluid, etc.