Symptoms of kidney yin deficiency include lumbago and fatigue, dizziness and tinnitus, spermatorrhea and premature ejaculation, dry mouth and sore throat, zygomatic flushing (redness of the cheekbones on both sides of the face), hot flashes (warmth of the hearts of the hands and the feet, and self-consciousness about warmth of the heart and chest), or hot flashes (a burst of warmth) in the afternoon, a red tongue with little or no moss, and a thin and countless pulse (the pulse is becoming narrower and finer, and the rate is accelerating), and so on. Kidney yin deficiency is mostly caused by injury to essence, depletion of fluid, or depletion of kidney yin due to acute febrile illness. Clinical manifestations include lumbar and knee soreness and pain, dizziness, tinnitus, loose teeth, hair loss, men’s yang strength (the penis does not become soft for a long period of time after erection, and semen overflows on its own), easy lifting, spermatorrhea, premature ejaculation, women’s menstrual periods are scanty or menstrual periods are closed, metrorrhagia (menstrual periods that are too heavy or more than a drip), insomnia, and forgetfulness, etc. If you have any of the above symptoms, please go to a doctor promptly. If you have any of the above symptoms, please go to the hospital in time for consultation and active treatment, so as not to delay your condition.