Kidney Stones Blood Urine. The prognosis varies from person to person. One of the most serious causes of blood in the urine is a tumor in the kidney or bladder.
Over time the crystals can become small hard stones. As the stones grow they may eventually become large enough to irritate either the lining of the kidney or the ureter the tube connecting the kidney to the bladder and cause injury to the local cells and capillaries. Some people with kidney stones only have blood in their urine which is picked up by a dipstick test.
The minerals in concentrated urine sometimes form crystals on the walls of your kidneys or bladder.
Sometimes kidney stones are incidentally detected by the presence of microscopic hematuria blood in the urine. The resulting urine is often cloudy and orange red or pink depending on the amount of blood in it. Bad falls may cause blood clots to appear in the urine. Visible blood in the urine gross hematuria.