You're cleaning the litter box and notice pink or red-tinged urine. Your heart sinks. Blood in your cat's urine is one of those symptoms that immediately sets off alarm bells—and rightfully so.
The good news? Caught early, most causes of hematuria are treatable. The key is recognizing whether your cat needs care today or if it's an emergency requiring immediate intervention. Let's break it down.
What Causes Blood in Cat Urine?
Blood in urine indicates inflammation, infection, or injury somewhere in the urinary tract—kidneys, bladder, urethra, or ureters. Common causes include:
- Urinary tract infection (UTI) — Bacterial infections inflame the bladder lining. More common in older cats or those with diabetes.
- Bladder stones (uroliths) — Mineral crystals form stones that irritate and scrape bladder walls. Very painful.
- Feline idiopathic cystitis (FIC) — Bladder inflammation with no identifiable cause. Stress is a major trigger. Most common in young to middle-aged cats.
- Urinary blockage — LIFE-THREATENING. Mucus plugs or stones block the urethra, preventing urination. Almost exclusively affects male cats due to their narrower urethra.
- Trauma — Hit by car, fall from height, or rough handling can cause internal bleeding.
- Tumors or polyps — Less common but possible, especially in senior cats.
🚨 EMERGENCY: Get to a Vet Immediately If:
- Straining to urinate with little/no urine produced — This is a blockage. Fatal within 24-48 hours if untreated.
- Crying, yowling, or vocalizing in the litter box — Sign of severe pain
- Frequent trips to litter box with no results — They feel the urge but can't go
- Licking genitals excessively — Trying to relieve discomfort
- Vomiting — Toxin buildup from inability to urinate
- Lethargy, hiding, or collapse — Sign of systemic illness or toxicity
- Distended, painful abdomen — Bladder is overfull
- Male cat showing ANY of these signs — Male cats block faster and more severely
Why male cats are at higher risk: Male cats have a longer, narrower urethra that's more prone to blockage from crystals, stones, or mucus plugs. A blocked male cat is a medical emergency—period. Without treatment, toxins build up, kidneys fail, and the cat can die within 24-48 hours.
What You Might See at Home
Signs to watch for beyond blood in urine:
- Small, frequent urinations (or attempts to urinate)
- Urinating outside the litter box—on cool surfaces like tile or bathtubs (feels soothing to inflamed bladder)
- Blood-tinged or pink urine
- Strong or unusual urine odor
- Excessive grooming of genital area
- Hunched posture or reluctance to move
What the Vet Will Do
Your vet will perform a physical exam, checking for a distended bladder and signs of pain. They'll likely run:
- Urinalysis — Examines urine for blood, crystals, bacteria, and abnormal cells
- Urine culture — Identifies specific bacteria causing infection
- Blood work — Checks kidney function and hydration status
- X-rays or ultrasound — Looks for stones, tumors, or structural abnormalities
If your cat is blocked, treatment is urgent: catheterization to relieve the blockage, IV fluids to flush toxins, pain management, and hospitalization for monitoring. Once stable, your vet will address the underlying cause—dietary changes, antibiotics for infection, or surgery for stones.
Can You Do Anything at Home?
If your cat is producing urine and otherwise acting normal (eating, drinking, playing), you can support them while arranging a vet visit:
Supportive Care at Home:
- Increase water intake — Add water fountains, try wet food, or flavor water with tuna juice
- Reduce stress — Quiet environment, extra hiding spots, pheromone diffusers (Feliway)
- Keep litter boxes clean — Scoop multiple times daily. Cats with bladder issues are extra sensitive
- Monitor closely — Watch for worsening symptoms or signs of blockage
DO NOT: Give your cat human pain medication. Many are toxic to cats. Only use medication prescribed by your vet.
Prevention: Keeping Your Cat's Urinary Tract Healthy
- Feed high-quality, moisture-rich food (wet food is ideal)
- Provide multiple water sources throughout the house
- Maintain a stress-free environment (routine, resources, calm)
- Keep litter boxes clean (one per cat plus one extra)
- Encourage play and exercise to prevent obesity
- Regular vet checkups, especially for senior cats
Cats with a history of urinary issues may benefit from prescription urinary diets that prevent crystal formation and promote dilute urine.