Kidney yin and yang deficiency tongue manifestation is the tongue dark red, tongue body fat, accompanied by limbs not warm, fear of cold, hands and feet heart fever and other symptoms. Kidney yin and yang deficiency is due to the deficiency of kidney yin, kidney yang deficiency caused by the evidence, the evidence of this disease tongue manifestation for the tongue texture dark red, tongue body fat, tongue moss white, clinical manifestations of the limbs are not warm, fear of cold, dizziness, tinnitus, hands and feet heart fever, waist and knee soreness and weakness (waist and knee soreness and weakness of the sensation), impotence, spermatorrhea, and so on. Kidney yin and yang deficiency is mostly caused by factors such as physical weakness, over-exertion of labor and injuries, indolence in the room, prolonged illness and kidney, and old age and physical decline. The treatment should be to replenish the yin and yang. The appearance of yin and yang deficiency should be timely medical treatment, under the guidance of the doctor to identify the symptoms and use of medication, so as to avoid delays in the condition.