my five year old son had some blood in his urine at the end of urination but not during. the first test the said showed no infection, but WBC and RBC was high. so they did another type of blood and urine test, all look O.K. but the MICROALBUMIN, UR, QN, DETECTION LIMIT <= 20 MG/L is at 70.6 and the MICROALBUMIN/CREATININE is at 81. the blood has not been present for the last day or so and he is not showing any pain or discomfort. please advise. thanks!