Kidney yin deficiency and kidney yang deficiency can both lead to hair loss. The kidneys are responsible for the bones and marrow, and their splendor lies in the hair. Kidney deficiency includes different conditions such as kidney yin deficiency, kidney yang deficiency, and kidney essence deficiency. Both kidney yin deficiency and kidney yang deficiency can lead to hair loss. Hair loss caused by kidney yin deficiency is often accompanied by symptoms of kidney yin deficiency such as soreness and weakness of the waist and knees, warmth in the hands and feet, dizziness and tinnitus, hot flashes and night sweating (abnormal sweating after going to sleep, but sweating stops after waking up). Treatment is mostly symptomatic through nourishing yin, tonifying the kidneys and hair growth. Kidney yang deficiency can also lead to hair loss. Kidney yang deficiency hair loss is often accompanied by symptoms such as lumbar soreness and coldness, cold hands and feet, and frequent urination and spontaneous sweating (involuntary sweating during the daytime, aggravated by sweating when you move a little). Treatment is mostly through warming the yang, tonifying the kidneys and hair growth medication. If there is hair loss, it is recommended to choose the medication to adjust the treatment under the doctor’s guidance and identification.