The main difference between kidney yin deficiency and kidney yang deficiency lies in the symptoms, tongue coating, and treatment medications. Patients with kidney yin deficiency may show symptoms of deficiency heat, such as heat in the heart of the hands and feet, dizziness and tinnitus, lumbar and knee soreness (a feeling of soreness and weakness in the lumbar and knee areas), hot flashes (a burst of heat), night sweating (abnormal sweating after going to sleep, but sweating stops after waking up), redness of the cheekbones in the afternoon, spermatorrhea and premature ejaculation for men, low menstrual flow or amenorrhea for women, a red tongue with little moss and a fine pulse, etc. Patients with kidney yang deficiency will have deficiency cold symptoms. Patients with kidney yang deficiency will have symptoms of coldness, such as fear of cold, cold hands and feet, frequent urination and spontaneous sweating (involuntary sweating during the daytime, aggravated by sweating with a little movement), prolonged ejaculation, clear and long urination, mental depression, cold pain in the waist and knees, loss of libido, impotence in men, infertility in women with uterine cold, pale tongue with white coating and sunken and feeble pulse. Kidney yin deficiency can be treated by taking medicines that nourish yin and tonify the kidneys, such as Liu Wei Di Huang Wan and Zuo Gui Wan. Kidney yang deficiency is often treated with medicines that warm kidney yang (warming and replenishing kidney yang), such as Gui Fu Di Huang Wan and Yu Gui Wan. Therefore, when the above symptoms occur, you should pay attention to them, consult a doctor in a timely manner, and take standardized treatment under the guidance of a doctor, do not take medication on your own.