Kidney water deficiency, i.e. kidney yin deficiency, is a symptom of deficiency of yin and fluid in the kidneys, which is mainly manifested by symptoms such as five heart-heat (heat in the hearts of the hands and feet, and self-consciousness of the heart and chest), hot flushes (bursts of heat), and night sweating (abnormal sweating after falling asleep, and stopping of sweating after waking up). Kidney Yin deficiency is mostly caused by prolonged illness, too much sex, prolonged staying up late and unhealthy diet. The main manifestations are five heartburn, hot flashes, night sweating, lumbar and knee pain, dizziness and tinnitus, insomnia and dreaming, spermatorrhea in men, and menorrhagia or amenorrhea in women. Patients with kidney yin deficiency should live a regular life, ensure sufficient sleep and avoid staying up late. Clothing should be added or subtracted according to seasonal and weather changes. Adhere to exercise, you can take walking, jogging, yoga, playing tennis, playing Tai Chi and other sports. Professional medical problems suggest consulting a doctor.