Low back pain is a common symptom caused by kidney deficiency. Besides kidney deficiency, other causes can also cause low back pain, which should be analyzed in the context of the patient’s specific situation. Kidney deficiency is a term used in Chinese medicine and can be accompanied by many symptoms, among which back pain is one of the common symptoms caused by kidney deficiency, mainly seen in the elderly, people with congenital deficiency of kidney energy and weak body. In addition, living in a humid place, sweating and wind after exertion, catching a cold in the rain, etc., all these causes can lead to the invasion of cold and dampness, affecting the operation of Qi and blood in the lower back, resulting in symptoms of back pain. At the same time, prolonged heavy physical labor or long-term improper body position, improper lumbar exertion, trauma, etc. may lead to blood stasis blocking the meridians of the lumbar back and poor qi and blood flow, resulting in symptoms of lumbago. For the above common causes, patients can consume more kidney tonifying foods in daily life, such as sesame, wolfberry, mulberry, etc. Pay attention to the warmth of the lumbar back, correct poor sitting posture, avoid incorrect lumbar exertion, and carry out appropriate exercise.