Under normal circumstances, urinary routine in the occult blood and red blood cells should be negative, if a single recheck urinary occult blood (+), it is recommended to recheck again after a period of time, if the urinary occult blood turns negative, it is regularly rechecked, if long-term recheck, urinary routine in the occult blood (+), especially urinary red blood cells microscopy exceeds the standard, at this time need to find the cause: 1, first of all, it is recommended to do kidney ultrasound, to see if there is no urinary stones, there is no kidney cysts, or even tumors, this will cause long-term urinary occult blood (+), need to do CT examination and urinary exfoliative cytology aspiration treatment; tumors need to do CT examination and urinary cysts, There is no kidney cyst, or even tumor, this will lead to long-term urinary occult blood (+), need to drain the stone or kidney cyst puncture fluid treatment; tumor need to do CT examination and urinary exfoliation cytology examination, to the urology department regular diagnosis and treatment; 2, there is no glomerulonephritis or IgA nephropathy, at this time urine red blood cell morphology usually suggests deformed red blood cells as the main, at this time, if there is no protein in the urine, can be regularly re-examined If there is protein in the urine, it is recommended to be hospitalized to do systematic treatment and clarify the cause, or even to do a kidney biopsy. In short, occult blood in urine indicates that there may be blood cells in urine, and we should do urine red blood cell morphology examination and other tests to clarify the source of blood urine.