The presence of blood in urine is always reflecting a pathology. Blood can come from the kidney as well as from the urinary tract (bladder most frequently, but also, ureter or prostate).
At age 56, if you are a man, you should see a urologist rapidly because there is a possibility of cancer in the bladder. You should also see your physician which should perform rapidly a renal ultrasound to exclude any problem coming from the kidney (kysts, tumor, stone…). A urine exam is also necessary to evaluate if there are other problems: protein in the urine, and analyze the type of red blood cells in the urine.
If you're a woman, the same is valid, but one should also exclude an infection as hemorrhagic cystitis is frequent, but not so worrisome.
In conclusion, please consult your physician without delay and let him check both your kidneys and the urinary tract.