Kidney stones usually do not cause death. Only the renal colic caused by kidney stones is more intense and can have a great impact on the physiology and psychology of patients. However, if kidney stones exist for too long, especially if the urinary tract obstruction caused is too long, it can cause hydronephrosis, decrease in kidney function, or even uremia, which can easily affect the life expectancy of patients. If hyperkalemia occurs, it may cause sudden death. Therefore, the effect of kidney stones on the body depends on whether they cause obstruction to the urinary tract and the length of the obstruction to the urinary tract. If the stone is small and does not cause urinary tract obstruction, the impact on the body is very small; if the stone is large and causes urinary tract obstruction, especially complete urinary tract obstruction, it will cause irreversible damage to kidney function in more than three months, which will cause gradual decline of unilateral kidney or bilateral kidney function and inevitably develop into uremia. Therefore, if kidney stones are found, they must be treated promptly.