Syndrome of kidney and liver yin asthenia refers to symptoms of interior disturbance of asthenia-heat due to consumption of liver and kidney yin fluid and failure of yin to control yang. This syndrome is marked by consumption of fluid due to chronic disease and improper regulation; or by interior impairment due to emotional disorder and consumption of yin due to hyperactivity of yang; or by consumption of renal essence due to intemperance of sexual life; or by exhaustion of liver and kidney yin fluid due to prolonged duration of febrile disease.

Clinical manifestations:
Dizziness, tinnitus and amnesia, dull pain in the hypochondria, aching and weakness of the loins and knees, insomnia and dreaminess, seminal emission, scanty menstruation or amenorrhea, or metrorrhagia and metrostaxis, dry mouth and throat, feverish sensation over the five centers (palms, soles and chest), night sweating and flushed cheeks, reddish tongue with scanty fur, thin and rapid pulse. Such symptoms are usually seen in various consumptive diseases (such as chronic hepatitis, cirrhosis of liver, liver cancer, chronic nephritis, diabetic nephritis, renal tuberculosis, kidney cancer, bladder cancer, systemic lupus erythematosus) and at the rehabilitative stage of various infectious diseases (such as sicca syndrome and sterility).

Analysis of the symptoms:
Dizziness, tinnitus and amnesia are caused by consumption of liver and kidney yin; dull pain in the hypochondria, aching and weakness of the loins and knees are caused by asthenia of liver and kidney yin and lack of proper nourishment; insomnia and dreaminess are caused by interior heat disturbing mind due to yin asthenia; seminal emission is caused by asthenia-fire disturbing essence sources scanty menstruation or amenorrhea is caused by asthenia of liver and kidney yin to replenish the thoroughfare and conception vessels; metrorrhagia and metrostaxis are caused by superabundance of fire disturbing the thoroughfare and conception vessels due to yin asthenia; dry mouth and throat, feverish sensation over the five centers (palms, soles and chest), night sweating and flushed cheeks, reddish tongue with scanty fur, thin and rapid pulse are the signs of lack of moistening due to yin asthenia and interior exuberance of asthenia fire.
 
Key points for syndrome differentiation:
This syndrome is marked by aching and weakness of the loins and knees, hypochondriac pain, dizziness, tinnitus and seminal emission as well as interior heat due to yin asthenia.