The following tests are needed for occult blood in urine: 1. Red blood cell phase examination is performed to determine whether the morphology of red blood cells is predominantly aberrant or homogeneous. Generally, abnormality-based red blood cells are considered medical hematuria, while homogeneous red blood cells are considered surgical hematuria; 2. Ultrasound examination of the urinary system, mainly to exclude the presence of urinary system stones, tumors, polyps, etc. caused by elevated urinary occult blood; 3. 4. urine triple cup test, which is mainly used to identify the site of occult blood in urine. If it is the initial segment of hematuria, the lesions in the urethra and bladder neck will be considered. If it is hematuria in the whole segment, it is mostly considered to be hematuria of nephrogenic origin or above the bladder. If the hematuria is in the final segment, lesions in the bladder triangle are most often considered.