The difference between kidney yin deficiency and kidney yang deficiency is mainly in the causes, clinical manifestations and treatment modalities. 1. Causes: Kidney yin deficiency is mainly caused by the decrease of body fluids, resulting in the kidneys not being able to get fluids; kidney yang deficiency is caused by the aging of the body and the weakness of the body. 2. Clinical manifestations: Kidney yin deficiency is mainly characterized by dry mouth and tongue, dizziness and tinnitus, night sweating (sweating abnormally after going to sleep, but sweating stops after waking up), etc. Kidney yang deficiency is characterized by fatigue (mental exhaustion, physical weakness), swelling, coldness and cold limbs (fear of cold, cold limbs) and other symptoms. 3. Treatment: Kidney yin deficiency should be treated by nourishing yin and clearing heat (nourishing yin essence and removing heat) and generating fluids, such as taking Zhi Bai Di Huang Wan or Liu Wei Di Huang Wan as prescribed by the doctor; Kidney yang deficiency should be treated by supplementing herbs or proprietary Chinese medicines with warmth and tonicity, such as Cinnamon, Deer Velvet Antler, Gui Wei Di Huang Wan, or Right Angelica Pill, and so on. If you are not feeling well, you should consult a doctor in time and choose the appropriate treatment under the doctor’s guidance.