Usually, the difference between kidney yin deficiency and kidney yang deficiency is mainly manifested in the differences of causes, symptoms and treatment methods. 1. Causes: Kidney yin deficiency is due to the lack of yin fluid in the body, due to the depletion of kidney yin fluid, often associated with acute febrile illnesses, long-term chronic diseases, overwork, long-term unhealthy work and rest and dietary habits and other factors. Kidney yang deficiency is the result of yang deficiency in the body or prolonged illness, excessive loss, and weakness in old age. 2. Symptoms: Patients with kidney yin deficiency usually have dry mouth and tongue, sore throat, irritability and anxiety, hot flashes (a burst of fever), night sweats (abnormal sweating after going to sleep, and sweating stops after waking up), and irritability, etc. Patients with kidney yang deficiency usually have symptoms such as cold hands and feet, weakness of limbs, fear of cold, and mental depression. 3. Treatment: In general, patients with kidney yin deficiency can consider using medicines such as Liu Wei Di Huang Pill, Zuo Gui Wan, Qi Ju Di Huang Pill and so on to alleviate the symptoms. Patients with kidney yang deficiency can use Right Angelica Pill, Si Shen Pill, Kidney Qi Pill and other drugs to relieve symptoms. The specific use of drugs should strictly follow the doctor’s instructions. Patients with kidney yin deficiency and kidney yang deficiency should maintain a regular routine, exercise moderately, and increase nutritional intake. It is recommended to consult a doctor in time to avoid delaying the condition.