Dry mouth and nocturnal urination can be considered as symptoms caused by yin deficiency, but the specific situation needs to go to the hospital, identify the cause of the disease, and standardize the treatment under the guidance of a professional doctor. Yin deficiency refers to the symptoms caused by the lack of yin fluid in the body, which can’t control yang. Clinically, night sweating (abnormal sweating after going to sleep, and the sweating stops after waking up), frequent urination at night, heartburn and insomnia, dizziness, tinnitus and other symptoms are common. Since yin deficiency cannot control yang, yang heat is relatively vigorous, thus yin deficiency is prone to internal heat, so it is also accompanied by symptoms such as dry mouth and mouth, dry throat, and low-grade fever. The treatment of yin deficiency is generally based on nourishing yin and moisturizing, nourishing yin and clearing heat (nourishing yin fluid and clearing heat). It is recommended that patients with the above symptoms seek medical treatment in time and do not take medication privately to avoid causing adverse reactions.