Kidney yang deficiency and kidney yin deficiency can be distinguished in terms of causes, symptoms and treatment methods. Kidney yang deficiency is caused by yang deficiency in the body or prolonged illness, excessive loss and weakness in old age, which can lead to coldness in the form of cold (cold body), cold limbs, lack of mental energy, shortness of breath and wheezing, lumbar and knee soreness, impotence, spermatorrhea, and nocturnal urination, etc. It can be treated with medicines such as Jeison Kidney qi pills and Right Angelica pills as prescribed by the doctor. Kidney yin deficiency is mostly caused by injury to essence, depletion of fluid, or acute febrile illnesses that deplete kidney yin. Symptoms include lumbar soreness and fatigue, dizziness and tinnitus, spermatorrhea and premature ejaculation, dry mouth and sore throat, zygomatic flushing (redness of cheekbones on both sides of the face), five heart-quenching heat (fever in the hearts of the hands and feet, and self-consciousness of the heart and chest fever), or afternoon flashes of heat (a burst of fever), and so on, and can be treated with medicines like Zuo Gui Wan and Six-flavored Dihuang Pills as directed by a doctor. The use of drugs need to be under the guidance of a physician, not self-medication.