Urine occult blood (+-) is actually a suspicious positive urine occult blood, or a weak positive urine occult blood condition. When there is urine occult blood (+-) may exist for a number of reasons: first, laboratory errors, which often return to normal after rechecking the urine routine. The second, there may be a case of specimen contamination, after women have menstruation, when the menstruation contaminated the urine specimen may appear urine occult blood weakly positive situation. Third, urinary occult blood (+-) is often seen in cases of urinary tract infection or urinary tract stones. Tumors in the urinary tract can also cause sodium urine occult blood, presenting as (+-), when an ultrasound or CT of the urinary tract is done to help rule out the presence of stones or tumors in the urinary tract. Fourth, if the urinary occult blood (+-), be alert for the possibility of glomerulonephritis.