Occult blood (+-) indicates that the occult blood is suspicious, that is, there may be a small amount of red blood cells in the urine. This situation indicates that the occult blood may not be serious, or the urine occult blood has been significantly reduced through treatment, it is recommended to continue to drink more water and urinate more often. Occult blood must be noted to exclude urinary tract tumors, because many of the early stages of urinary tumors are painless carnal hematuria, and preliminary laboratory screening can be performed by doing urine routine. If there are abnormalities, be sure to do ultrasound examinations of the kidney, ureter and bladder to rule out urinary tract tumors, urinary tract infections, and urinary tract tuberculosis may cause occult blood.