If fever always appears after kidney stone surgery, you need to go to the hospital for symptomatic treatment, and even hospitalization if necessary. Possible causes: 1, perinephric infection or kidney infection after kidney stone surgery, when fever symptoms can occur, often accompanied by perinephric abscess or abscess urine and other symptoms, need to select antibiotics for treatment according to the pus culture or urine culture, etc. 2, kidney stone surgery after the pipeline related infection, stone surgery will exist in the body ureteral stent tube, if the stent tube If the infection is caused by the stent tube, the body temperature can be continuously increased, then the ureteral stent tube should be removed in the hospital, otherwise the body temperature cannot be effectively reduced and controlled. 3. In this case, a second operation such as fistula or stone removal is needed to control the infection, otherwise the body temperature will not return to normal.