After extracorporeal shock wave lithotripsy, if there is a stone discharge, the stone can be seen directly out of the body, at this time it is necessary to use a colorless container to collect each discharge of urine and filter it before it can be seen. Stones are usually very small, only a few millimeters in size. Therefore, sometimes only the powder or residue of the stones, such as small black dots or brownish-yellow particles, about 3-4 mm in size, can be seen, and there are no very large stones that can be detected by the naked eye. If they are not filtered, the stones may be discharged without the naked eye being able to distinguish them. If you want to see the stone discharge, you must use a colorless container and filter the urine to collect any residual stones. During stone removal, it is necessary to drink more water and exercise, such as jumping or skipping rope, and if necessary, to use lithotriptic drugs to promote ureteral peristalsis or to release the spasm of the ureter, so that the stones can be removed more quickly.