Pain in the left side of the lower back and the back of the back can indeed be caused by stones, but it is only one of the causes of pain in the left side of the lower back and the back of the back. The presence of kidney stones as well as ureteral stones can indeed trigger pain in the left side of the lower back and the back of the back. At the same time, during the examination, it can be found that there is obvious percussion pain in the kidney area, and the nature of the pain is very serious, and it can even be a knife-like pain with a high degree of pain. The more common causes of left-sided back pain are lumbar muscle strain and myofasciitis of the lumbar and back, so the appropriate differential examination should be done.