The causes of urinary occult blood in children mainly include the following: 1, caused by children suffering from acute glomerulonephritis, which is often accompanied by edema, hypertension, etc. Children can be given timely diuretic treatment. 2, caused by children suffering from urinary tract stones, children suffering from ureteral stones, bladder stones or kidney stones will often cause urinary occult blood, often accompanied by severe pain in the urinary tract. 3, caused by systemic diseases in children, such as thrombocytopenic purpura or infectious mononuclear cell hyperplasia, these systemic diseases can also cause hematuria, resulting in urinary occult blood.