Syndrome of liver yin asthenia is the syndrome resulting from failure of yin to control yang due to consumption of liver yin. This syndrome is usually caused by emotional upsets, transformation of fire from qi stagnation and fire scorching liver yin; or by consumption of liver yin in the late stage of febrile disease; or by insufficiency of liver yin due to insufficiency of kidney yin and failure of water to strengthen wood.

Clinical manifestations:
Dull scorching pain in the hypochondria, dizziness, dry and irritating sensation in the eyes, hypopsia, feverish sensation over the cheeks, tidal fever and night sweating, feverish sensation over the five centers (palms, soles and chest), reddish cheeks in the afternoon, dry mouth and throat, or tremor of the hands and feet, reddish tongue with scanty fluid as well as taut, thin and rapid pulse. Such symptoms are usually seen in chronic hepatitis, cirrhosis of liver, liver cancer, gallbladder cancer and pancreas cancer as well as various infectious diseases at the late stage.
 
Analysis of the symptoms:
Dull pain in the hypochondria is caused by malnutrition of the liver due to consumption of liver yin; dizziness, dry and irritating sensation in the eyes and hypopsia are caused by failure of insufficiency of liver yin to nourish the head and eyes; feverish sensation of the cheeks and tidal fever in the afternoon, reddish cheeks, night sweating, feverish sensation over the five centers (palms, soles and chest) as well as dry mouth and throat are caused by asthenic fire disturbing inside due to yin asthenia and yang hyperactivity; tremor of hands and feet is caused by malnutrition of tendons and vessels due to asthenia of liver yin; reddish tongue with scanty fluid and taut, thin and rapid pulse are the signs of endogenous heat due to yin asthenia.

Key points for syndrome differentiation:
The diagnostic evidences for this syndrome are dull scorching pain in the hypochondria, dizziness, dry and irritating sensation in the eyes, hypopsia, feverish sensation of the cheeks, tidal fever, night sweating, feverish sensation over the five centers (palms, soles and chest) and dry mouth and throat.