Yin deficiency may lead to hair loss. Yin deficiency can lead to hair loss due to different diagnostic subtypes such as Liver Depression, Blood Heat, Blood Deficiency, Blood Stasis, Damp Heat, Kidney Deficiency, Spleen Deficiency, and Liver and Kidney Yin Deficiency (deficiency of yin fluids in the Liver and Kidneys). Yin deficiency of the liver and kidney refers to the deficiency of yin fluid in the liver and kidney organs. The deficiency will be accompanied by symptoms such as dizziness and tinnitus, distension and pain in the abdomen and ribs, lumbar and knee tenderness (a feeling of soreness and weakness in the lumbar and knee regions), emaciation, dry mouth and tongue, and five heartburns and heat (heat in the hearts of the hands and feet, and self-consciousness of the heart and chest being irritated and hot). It is mostly treated by medicines that nourish the liver and kidney for hair growth. Chinese medicines commonly used for treating Yin deficiency of the liver and kidneys, such as Hair Regrowth Pill and He Shouwu Tablet, are more commonly used. They are effective in nourishing the liver and kidneys and tonifying blood. It is often used for premature graying of hair, hair thinning, dryness, baldness and hair loss caused by deficiency of the liver and kidneys (weakness of the liver and kidneys). It is recommended to choose medicines for symptomatic treatment under the guidance of a doctor after identification of the symptoms.