Back pain may occur when there is kidney deficiency, but back pain is not always caused by kidney deficiency. Kidney deficiency back pain is categorized into two types: kidney yin deficiency and kidney yang deficiency, both of which may occur in the case of back pain. Kidney yin deficiency: vague pain in the waist, soreness, weakness, lingering, upset, sleeplessness, dry mouth and throat, flushed face, hot hands and feet; red tongue with little moss, fine pulse. Kidney yang deficiency: lumbar pain, soreness and weakness, lingering, localized cold, like warm and like to press, more serious when labor, lying down to alleviate, often recurring episodes, the face of the white (white and lusterless), cold limbs and fear of cold; tongue pale, moss thin white, pulse is thin and feeble. If the symptoms of waist pain are not relieved for a long time or accompanied by other discomforts, it is recommended to consult a doctor in a timely manner to identify the causes and carry out targeted treatment.