Kidney yin deficiency is mainly characterized by kidney deficiency and yin deficiency, such as lumbar and knee pain, five heart-heat (heat in the two hearts of the hands and feet, and self-consciousness of the heart and chest), hot flashes and night sweating (abnormal sweating after going to sleep, and sweating stops after waking up), and so on. Kidney Yin deficiency is mainly characterized by soreness of the waist and knees, heat in the hands and feet, five heartburns, dizziness, tinnitus and deafness, night sweating, afternoon as well as nighttime hot flashes, flushing of the cheekbones, spermatorrhea and impotence in men, and menstrual irregularities in women. The treatment of kidney yin deficiency is based on the principle of nourishing yin and tonifying the kidneys, and can be treated with Zuo Gui Wan or Liu Wei Di Huang Wan. When discomfort occurs, you should consult a doctor in time and choose medication under the guidance of the physician’s diagnosis, not self-medication, so as not to delay the condition.