Back pain after lithotripsy is normal. Because of the shattering of kidney stones and ureteral stones through extracorporeal shock waves, it has energy to be focused through the body surface to the site of the stones, and there will be some degree of damage to the lower back, so there will be pain. After the stone is crushed and becomes smaller, it is discharged from the kidney and ureter into the bladder, which will stimulate the ureter to spasm and also cause the pressure in the kidney to increase, which will also cause pain in the lower back. Lumbar pain after lithotripsy should be taken seriously. If the pain lasts for a long time and there is severe blood in urine and fever, one should pay attention to whether there is a manifestation of pus accumulation in the kidney, and should be actively observed, and if necessary, go to the hospital for examination and treatment. After lithotripsy, you should take oral antibacterial and drink more water.