Kidney yin deficiency; Weakness of waist and knees, weakness of legs, dizziness and tinnitus, insomnia and dreaminess; Men are prone to yang deficiency or impotence and nocturnal emission, while women are prone to menorrhagia or metrorrhagia, emaciation, hot flashes and night sweats, feverish sensation in the five senses, dry throat and red cheeks; Teenagers have white hair, dreamy molars, frequent urination, yellow stool, red tongue with little body fluid and rapid pulse.

Traditional Chinese medicine believes that the kidney is the innate foundation, and the yin essence in the kidney is the total source of yin fluid. Loss of yin essence can cause various diseases, such as dizziness, tinnitus, soreness of waist and knees, bone steaming hot flashes, diabetes and so on.