How long a kidney stone attack hurts is related to the size of the stone as well as its location. Smaller stones that are better located usually hurt for 1 to 2 hours, while larger stones hurt longer and can last for hours. 1. If the size of the kidney stone is small and the location of the stone is in the kidney or bladder without causing obstruction, there is usually no pain; however, although the size of the kidney stone is small, but if the stone is in the ureter, it is easy to lead to pain, which usually lasts for 1~2 hours, and the pain will be gradually relieved as the stone continues to be discharged downward as well as the time is prolonged. 2. If the size of the kidney stone is large, and the stone is embedded in the ureter for a long time, it will lead to frequent episodes of colic, the pain will last for a few hours, and with the stone embedded in the ureter for a long time, it will lead to the dilation of the ureter, and finally lead to hydronephrosis, the renal function is destroyed. Different kidney stone pain time is also different, suffering from kidney stones, patients should go to the regular hospital in time to avoid the deterioration of the condition.