If you have a kidney stone and cannot urinate, you may have a urinary tract infection. It is recommended to take a urine sample for routine examination and also to perform an ultrasound examination of the urinary tract to determine if the stone is obstructing the ureteral pelvis, resulting in a decrease in urine output and therefore causing the patient to be unable to urinate. If there are more white blood cells and red blood cells in the urine examination, it is considered that the stone is combined with infection, which is due to the irritation symptoms after urination infection, resulting in the patient’s inability to urinate or the decrease of urine volume. If the kidney stone is obstructed in the ureter of the renal pelvis, it will usually cause more obvious pain and decrease in urine output, especially if the kidney stone is obstructed bilaterally, the patient may have anuria, and ultrasound examination is needed.