Feline Lower Urinary Tract Disease (FLUTD)
An umbrella term encompassing disorders affecting the feline urinary bladder and urethra, including feline idiopathic cystitis, bladder stones, and urethral plugs.
💬 In Plain English
FLUTD describes several painful conditions involving a cat’s bladder and urethra. The most common form is Feline Idiopathic Cystitis (FIC), where emotional stress and an abnormal brain-bladder response cause sterile bladder wall inflammation. Cats visit the litter box repeatedly, strain to produce small drops, cry out in pain, lick their genitals excessively, and urinate outside the box. In male cats, mucous and crystals can completely plug the narrow urethra, preventing any urine from exiting—a rapid, fatal emergency.
🔬 Clinical & Technical Depth
For Vets & TechniciansFormal Clinical Definition
Syndrome of dysuria, pollakiuria, hematuria, and periuria in felines. Causes include Feline Idiopathic Cystitis (FIC, ~60–70% of cases), urolithiasis (struvite or calcium oxalate stones, ~15–20%), urethral plugs (~10–20%), and anatomical defects or neoplasia (<2%).
Why Veterinarians Use It
Veterinarians use FLUTD as a working diagnosis while determining whether the patient is an obstructed male (an emergency) or an unobstructed cat requiring stress reduction and medical therapy.
Clinical Context Encountered
Very common in young-to-middle-aged indoor cats, frequently triggered by household stressors (moves, new pets, conflicts) or dry diet with inadequate moisture intake.
Clinical Reference Guide (Medical Condition)
- •Urethral obstruction in male cats is a critical emergency: inability to urinate leads to severe hyperkalemia, bladder rupture, cardiac arrest, and death within 24 to 48 hours.
❓ Questions to Ask Your Veterinarian
Take these actionable questions with you to your next clinic visit or appointment:
- 1Is my cat currently obstructed (unable to pass urine)?
- 2Did the urinalysis show crystals, bacteria, or just sterile blood and inflammatory cells?
- 3Did radiographs show any bladder or urethral stones (uroliths)?
- 4What dietary moisture changes (canned food, water fountains) and environmental enrichment strategies (MEMO) do you recommend?
Academic & Clinical References
- AAFP and ISFM Guidelines on Feline Idiopathic Cystitis and Environmental NeedsOrganization: American Association of Feline Practitioners (AAFP) • Published: 2013-03-01 • Accessed: 2026-01-10https://catvets.com