Kidney yin deficiency means that the yin fluid and essence in the kidneys are reduced and cannot be nourished. Kidney yin deficiency manifests itself in the form of “heat”, which is not real heat but imaginary heat, and is accompanied by symptoms such as lumbar pain, dryness and heat, night sweating, false sweating, dizziness, and tinnitus. The causes of kidney yin deficiency are as follows: (1) Long-term exertion, poor health, and long-term illnesses, which consume the body’s essence, leading to a decrease in yin fluid in the kidneys, resulting in kidney yin deficiency; (2) The later stages of some diseases are also accompanied by kidney yin deficiency, which can often be alleviated after treating the disease; (3) Excessive consumption of warm and dry foods, blindly tonifying the body, which can damage the body by taking tonic medicines indiscriminately. Indiscriminate consumption of tonic drugs will damage the body’s yin fluid, resulting in kidney yin deficiency; (4) uncontrolled intercourse, unrestrained sex life, excessive masturbation, etc. The first thing that affects the kidneys is the depletion of the essence of the kidney in the micro-substances will also lead to kidney yin deficiency, which is often the main cause of kidney yin deficiency among modern people. Therefore, the causes of kidney yin deficiency are mainly the above aspects, when the patient has kidney yin deficiency or to actively go to the treatment, do not feel ashamed to talk and self-medication.