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Lower Urinary Tract Disease and Urethral Obstruction

Painted illustration of lower urinary tract disease and urethral obstruction in a cat

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.

Source:

Related conditions

Cryptorchidism (Retained Testicle)

Retained Testicle

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Diabetes

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