what can cause blood clots in the bladder?
<answer> Causes of Blood Clot in Urine are 1 Problems in urinal tract and kidney diseases. 2 Stones in kidneys or the urinary bladder and the infections can cause hematuria. 3. Urinary tract infection. <context> Kidney and urinary tract problems. 1  Kidney stones. 2  Urinary tract infection (cystitis) (Along with kidney stones, UTIs are the most common cause of blood in the urine of people under 40) 3  Bladder infection. 4  Inflammation of the bladder, urethra, or kidney (called glomerulonephritis) 5  Cancer of the bladder, kidney, or prostate.