Kidney yin deficiency is a deficiency-heat syndrome, manifested by deficiency of kidney yin, loss of nourishment, and internal disturbance of deficiency-heat; kidney yang deficiency is a deficiency-cold syndrome, manifested by deficiency of kidney yang (deficiency of yang qi of the kidneys), loss of warmth, and deficiency-cold syndrome of diminished reproduction and qi-chemistry functions. The pathogenesis and clinical symptoms of the two are different. Kidney yin deficiency is a deficiency of kidney yin, manifested by lumbar and knee soreness and weakness (the feeling of lumbar and knee soreness and weakness), dizziness, tinnitus, insomnia and forgetfulness, weight loss, heartburn and heat (heat in the heart of the hands and feet, and self-consciousness of the heart and chest heat), hot flashes and night sweating (sweating abnormally after going to sleep, and stopping sweating after waking up), evaporative fever of the bones, dry pharynx and zygomatic bone redness (redness of cheeks and zygomatic bone), spermatorrhea and premature ejaculation of the man, menorrhagia, and scanty menstruation of the woman, and so on. Kidney yang deficiency is a deficiency of kidney yang, manifesting as soreness and cold pain in the waist and knees, coldness (fear of cold, cold limbs), dizziness, facial color 晄white, mental depression, loss of libido, impotence and premature ejaculation in men, slippery semen and cold semen, infertility in women with uterine cold, clear and dilute amount of leukorrhea or more than a long period of diarrhea, complete the grain does not dissolve (there are more undigested food in the stool), or urinate long and clear, urinate more often at night, and so on. If there is any discomfort, it is recommended to consult a doctor in a timely manner, not blindly use their own medication.