The method of expelling kidney stones from the body is related to the size of the stones.

If the diameter of the kidney stone is less than 0.6 centimeters, it can generally pass smoothly through the ureter and urethra to the outside of the body. This can be facilitated by drinking plenty of water and performing physical activity to naturally expel the stones.

If a stone gets stuck in a physiologically narrow part of the ureter during expulsion, conservative treatment methods can be used to dilate the ureter, allowing the stone to pass on its own.

If the kidney stones are relatively large but do not cause obstruction within the kidney, they can be observed temporarily without treatment.

If larger stones get stuck in the ureter or urethra and cannot be expelled on their own, surgery is generally required to remove the stones. After surgery, it is also important to drink plenty of water and urinate frequently.