Kidney yin and kidney yang are relative terms, and the criterion for kidney yin and yang balance is that kidney yin and kidney yang are neither over-exuberant nor under-exuberant, and both remain harmonized in a state. Kidney yin deficiency will be manifested as dryness of the mouth and throat, five heart-heat (heat in the hearts of the hands and feet, and self-consciousness of the heart and chest), red face and cheekbones (cheeks and cheekbones are reddish in color), lumbar and knee soreness (lumbar and knee soreness and weakness), insomnia and forgetfulness, and other signs of yin deficiency, such as women’s menstruation, and men’s spermatozoa and premature ejaculation, which can be treated by taking the Six Flavors of the Earth (Liou Wei Di Huang Pill) to replenish the essence of the kidneys. Kidney yang deficiency will be manifested as cold waist and knees, cold limbs, mental fatigue, urination, frequent urination at night, etc. Yang deficiency cold phenomenon, or even women infertility, impotence, decreased libido, etc., you can take the Jin Gui Kidney qi pills or right angelica pills to replenish the kidney yang. Usually, we should pay attention to keep a good mood, eat and drink, moderate labor and rest and abstain from sex, in order to maintain the balance of kidney yin and yang. When the above symptoms of kidney yin and yang deficiency occur, you should consult a doctor for standardized treatment under the guidance of a doctor.