Lower Urinary Tract Disease and Urethral Obstruction

What is it?
Feline lower urinary tract disease (FLUTD) describes conditions of the bladder and urethra. The most common is stress-related bladder inflammation (idiopathic cystitis); stones, crystals, and infections also occur. In male cats, plugs can block the urethra, which is a life-threatening emergency.
What signs should I watch for?
Signs to watch for include frequent trips to the litter box with little urine; straining or crying while urinating; blood in the urine; urinating outside the box; and straining with no urine produced (EMERGENCY, especially in males).
How is it diagnosed and treated?
Urinalysis, urine culture, and X-rays or ultrasound help find the cause. A blocked cat needs emergency anesthesia and a catheter to relieve the obstruction. Other cases are managed with pain relief, diet changes, and stress reduction.
Can it be prevented, and what's the outlook?
- More water (wet food, fountains), a therapeutic diet if advised, clean litter boxes, and a calm home help prevent repeat episodes.
- A cat who strains without producing urine should be seen right away.
Reviewed by the Adler Veterinary Hospital veterinary team, October 2026.
Cats; male cats risk a life-threatening blockage
Who's at risk:
Straining, frequent small urinations, blood in urine
Main signs:
Emergency — see a vet now
Urgency:
When to call a vet right away
- Straining with no urine produced (an emergency, especially in males)
- Straining or crying while urinating
- Frequent trips to the litter box with little urine
Not sure whether it can wait? Call us anyway. Our team can help you decide.
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