Kidney is an integral part of the waist, and the waist includes not only the kidney, but also the waist muscles and the lumbar spine and so on. In the clinic will often find such a phenomenon, some patients think that back pain is kidney pain, think that as long as the waist problem is a kidney problem, in fact, this is a misunderstanding. In fact, this is a misunderstanding. The lumbar region covers a wide range, including not only the kidneys, but also the lumbar vertebrae and the lumbar muscles. For example, for men, if there is pain in the lower back, it is more common to have lumbar muscle strain or lumbar disc herniation. The pain in the lower back caused by kidney disease is relatively rare. Of course, kidney diseases can cause back pain, such as kidney stones, acute pyelonephritis, acute glomerulonephritis, renal cysts and polycystic kidneys. All of these diseases can lead to increased size, or the ureter is stretched, causing back pain or discomfort. If you suspect that the pain in the lower back is caused by renal diseases, you can take urine routine, ultrasound of kidney or CT and other corresponding examinations to further clarify the diagnosis.