Cat Can't Pee (Emergency): what should I do first?

Going in and out of the litter box repeatedly, straining for a long time, or crying in pain are signs that urinary stones (uroliths) or crystals are blocking the urethra. Male cats have a long, narrow urethra that blocks easily. A delay of just a few hours can lead to acute kidney failure. Because straining to pee looks very similar to constipation, check the cat litter for urine clumps first.

What should I avoid doing?

Assuming it is just constipation and waiting until morning (by morning, your cat may collapse or lose consciousness). / Pressing or massaging your cat's belly to help them pee (this can rupture the bladder).

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Cat Straining to Pee with Little or No Urine: Emergency Blockage Guide

🚨 Check first

Life-threatening emergency: If your cat has not peed for 24 hours or more, or squats repeatedly in the litter box but produces only a few drops, this is likely a urethral obstruction (urinary blockage). A blocked cat can die of uremia within 48 hours, so go to an emergency vet right away, even at night.

📌 The answer in 3 seconds

Going in and out of the litter box repeatedly, straining for a long time, or crying in pain are signs that urinary stones (uroliths) or crystals are blocking the urethra.
Male cats have a long, narrow urethra that blocks easily. A delay of just a few hours can lead to acute kidney failure.
Because straining to pee looks very similar to constipation, check the cat litter for urine clumps first.

📊 Flowchart

Step 1Scoop through the cat litter to check if there are any urine clumps (or wet spots on the pad of a two-tier litter box) from the past 12–24 hours.
Step 2If there are no clumps—or only tiny clumps about 2 cm (0.8 in), the size of a small coin—do not wait and see. Call your vet or an after-hours emergency clinic right away.
Step 3Because the bladder is dangerously full and tight, place your cat gently into a cat carrier without pressing on their belly and head to the vet.

⭕ Step-by-step fix

Step 1 · What you can do at home right now
Scoop through the cat litter to check if there are any urine clumps (or wet spots on the pad of a two-tier litter box) from the past 12–24 hours.
Step 2
If there are no clumps—or only tiny clumps about 2 cm (0.8 in), the size of a small coin—do not wait and see. Call your vet or an after-hours emergency clinic right away.
Step 3
Because the bladder is dangerously full and tight, place your cat gently into a cat carrier without pressing on their belly and head to the vet.

❌ Never do this

Assuming it is just constipation and waiting until morning (by morning, your cat may collapse or lose consciousness).
Pressing or massaging your cat's belly to help them pee (this can rupture the bladder).

📋 Make notes for the vet

Your notes save automatically on this device, so they stay even without a signal at the clinic.

Your cat

Since when

Symptoms and things to tell the vet

When your cat last peed (how many hours ago).
How many times your cat squatted in the litter box and whether they cried out.
Past history of struvite stones or cystitis, and the type of food they currently eat.

Urine

Stool

Photos and items to bring

Notes (breathing rate, amount eaten, times, etc.)