Slightly red urine 2 days. Sometimes clear. Bladder cancer or kidney stone? 3 stones in kidney. Don't smoke. No pain. Ab ultasnd nrml back in November

Urine culture . Painless hematuria or blood in the urine could be a manifestation of bladder cancer. If this were a kidney stone you would probably have flank pain but on occasion it can be painless. A urinary tract infection usually presents with pain on urination. I would suggest getting a urine culture but if it persists a urological workup and cystoscopy may be needed.