Possible reasons for urinary stones causing difficulty in urination: 1. Stones have been discharged into the end of the ureter, which can cause obvious bladder irritation, always feeling that there is urine in the bladder, but unable to urinate. If ultrasound examination can confirm that there is no urine in the bladder, because the irritation sensation is enhanced, there is a small amount of urine in the bladder, which can cause a strong desire to urinate, and the urine volume is too small, so you feel unable to urinate or have difficulty in urinating. If the blockage is complete and you cannot urinate, you need to go to the hospital immediately for catheterization or suprapubic cystostomy or transurethral resection to restore the normal urinary function.