Kidney stones are usually associated with renal colic. Kidney stones that become lodged will usually cause renal colic clinically. Of course, whether or not renal colic or other symptoms will occur depends crucially on the location and size of the kidney stone. Generally, small kidney stones can sometimes be eliminated from the body. If a large kidney stone is retained in the kidney, it may not have any clinical symptoms and may only be detected during imaging. In addition to renal colic, they may also lead to kidney bleeding, urinary bleeding or secondary urinary tract infection. Therefore, for children with kidney stones, one of the clinical follow-up should be long-term, and the other should be controlled if there is secondary infection, which is quite important.