Hematuria in female cats is usually caused by urinary tract infection, nephritis, hypothrombosis, cystitis, urethritis, urethral stones, bladder stones, or estrus. If the female cat often has blood in her urine, and If it is accompanied by frequent urination, low urination and other reasons, it is best to take the cat to the pet hospital for examination to confirm the cause and treat it promptly to avoid delaying the condition, otherwise it may easily cause life danger.