The most common cause of pain in the left kidney is a kidney stone, followed by acute pyelonephritis. If it is determined that the renal colic is caused by kidney stones, pain medication can be applied. The most common choice is non-steroidal anti-inflammatory drugs, such as indomethacin suppositories, can be used to plug the anus, some patients can relieve the pain. If the pain is still not relieved, narcotic analgesics can be used, and the more commonly used is pethidine, which can be injected intravenously or intramuscularly. If the pain is still not relieved, it can be repeated again in six hours. After the above treatment, most of them can be relieved. If the pain is not relieved, the treatment can be combined with 654-2. 654-2 is given as 10mg or 20mg in 500ml of fluid in an IV drip, and more fluid should be given to increase the urine volume to promote the downward movement of the stone. If the pain in the left kidney is caused by acute pyelonephritis, anti-infection treatment with antibiotics should be given, the more commonly used ones are cephalosporins and quinolones, the pain will disappear naturally after the inflammation is controlled.