The main hazards of laser lithotripsy for kidney stones are as follows: First, after lithotripsy, the broken stones may not be discharged from the body and stay in the ureter for a long time, leading to ureteral obstruction and secondary urinary system infection, resulting in hydronephrosis and urinary tract infection. If the obstruction is not released in time, it may cause hydronephrosis and eventually lead to renal insufficiency. Secondly, laser lithotripsy may damage the kidneys or cause skin ecchymosis, and may lead to intestinal damage and occult blood in the stool, and in the most serious cases, it may lead to kidney shattering and life-threatening, so it needs to be taken seriously. Thirdly, after laser lithotripsy, kidney colic may be induced during stone removal, and patients may experience back pain, unbearable, sweating, nausea, vomiting and other symptoms.