1 cm stones are more difficult to remove on their own, but can be helped by surgery and other means. Urinary stones can occur anywhere throughout the urinary tract, including the kidneys, bladder, ureters and urethra, with kidney stones and ureteral stones being the most common. For smaller kidney stones, whether a urinary stone can be expelled on its own depends on the following aspects: 1. The size of the longest diameter of the stone: if the longest diameter of the stone is less than or equal to six millimeters, then it is discharged in about 90% of the possibilities, for example, kidney stones are generally below 6mm, it is possible to be discharged through the drug. At this time, you can take medication at the same time, drink more water, jumping to assist in stone removal. 2. Whether there is urinary obstruction stenosis and congenital lesions: six millimeters of stones can be excluded on the premise that the ureter or urethra is relatively smooth, and there is no obvious stenosis, or else it is easy to incarceration. Extracorporeal shock wave lithotripsy can be considered for kidney stones less than 20mm in diameter and upper ureteral stones. Larger stones or stones located in the lower part of the ureter and other stones that are not easily discharged from the body, you can choose to laser lithotripsy through the ureteroscope, said laparoscopic ureterotomy to remove the stone. Regardless of the type of stone, early medical attention is recommended to further evaluate its size and location to choose the best way to remove it.