Blood in Urine and Kidney Stones: What Urologists Say You Need to Know The most common misconception about blood in urine kidney stones is that visible blood always indicates a more serious condition than microscopic blood. This is not reliably true. Microscopic hematuria (blood visible only on urinalysis, not to the naked eye) requires the same systematic investigation as gross hematuria (visible blood) because both can be caused by conditions ranging from kidney stones to urinary tract infection to more serious urological pathology that requires diagnosis. https://telegra.ph/Blood-in-Urine-and-Kidney-Stones-What-Urologists-Say-You-Need-to-Know-09-21