Is straining to urinate an emergency in cats?

Yes — especially in male cats. A blocked urethra prevents urination and can become fatal within 24–48 hours. Treat as an emergency and contact a vet immediately.

How do I know if my cat is blocked?

Signs include frequent trips to the tray with little or no urine, crying, licking the rear, hiding, vomiting and a hard, painful abdomen. Some cats strain outside the tray.

Feline lower urinary tract disease describes inflammation and discomfort of the bladder and urethra. Stress, diet, crystals and infection can contribute. Male cats are at highest risk of blockage.

Can wet food prevent urinary problems?

Increased water intake helps dilute urine. Many UK vets recommend wet food, multiple water bowls and stress reduction for cats with recurrent urinary signs.

Cat Health

Cat Straining to Urinate UK — Blocked Bladder Emergency Guide

Published 1 June 2026Last updated 25 June 20262 min read

Quick answer

If your cat is straining to urinate, crying in the litter tray, or passing little or no urine, treat it as an emergency — especially if male. A blocked bladder can be fatal within hours. Do not wait until morning; contact your vet or an emergency clinic immediately.

Why this is urgent in male cats

Male cats have a narrow urethra. Inflammation, crystals or plugs can prevent urine leaving the body entirely. Toxins build up in the bloodstream, causing pain, vomiting, collapse and death if untreated.

Female cats can also have painful urinary disease, but complete blockage is less common — though they still need prompt veterinary care.

Signs to watch for

Visiting the litter tray repeatedly with little output
Straining and crying
Blood in urine
Licking genitals excessively
Urinating outside the tray
Vomiting, lethargy, hiding
Hard, distended abdomen

What happens at the vet

Your vet will examine your cat and may perform blood tests, urinalysis and imaging. Blocked cats require sedation or anaesthesia to relieve the obstruction, often with a urinary catheter and fluids.

Hospitalisation is common. Recurrence is possible — many cats need long-term diet and stress management.

Home care after treatment

Follow your vet's plan precisely:

Feed prescribed urinary or wet diets
Provide multiple fresh water sources
Reduce stress — quiet litter locations, Feliway diffusers if advised
Keep litter trays clean (one per cat plus one extra)

When to call the emergency vet

Go immediately if straining produces no urine, your cat is vomiting, or you suspect blockage. In the UK, use Vets Now out of hours if your practice is closed.

Sources & further reading

Facts in this guide are rewritten in plain English from publicly available UK advice. We name the organisation where a specific point comes from their guidance. Links below go to the original pages — use them to read the source material directly.

PETHEALTH+ is independent. These organisations do not sponsor, approve, or partner with this website. Guidance checked against sources listed below (last updated 2026-06-25).

Related guides

Frequently Asked Questions

Is straining to urinate an emergency in cats?: Yes — especially in male cats. A blocked urethra prevents urination and can become fatal within 24–48 hours. Treat as an emergency and contact a vet immediately.
How do I know if my cat is blocked?: Signs include frequent trips to the tray with little or no urine, crying, licking the rear, hiding, vomiting and a hard, painful abdomen. Some cats strain outside the tray.
What is FLUTD?: Feline lower urinary tract disease describes inflammation and discomfort of the bladder and urethra. Stress, diet, crystals and infection can contribute. Male cats are at highest risk of blockage.
Can wet food prevent urinary problems?: Increased water intake helps dilute urine. Many UK vets recommend wet food, multiple water bowls and stress reduction for cats with recurrent urinary signs.