Cat Peeing Outside the Litter Box? UTI Signs, Causes and Fixes

The short answer: a cat that pees outside the litter box is usually telling you one of three things: it has a urinary or other medical problem, something about the litter box is wrong, or it’s stressed or marking territory. Always rule out a medical cause first. Bladder problems such as cystitis are very common, and painful peeing often makes cats avoid the tray.

Emergency: if your cat, especially a male cat, is straining in the litter box with little or no urine coming out, crying while trying to pee, or keeps going back and forth to the tray, see a vet immediately. This can be a blocked bladder. The Cornell Feline Health Center calls urethral obstruction an absolute emergency, and warns that a completely blocked cat can die in less than 24 to 48 hours.

Signs of a urinary problem in cats

According to Cornell, signs of lower urinary tract disease include:

• straining to pee, or crying out while peeing
• going often but passing only small amounts
• blood in the urine (pink or red urine, or red spots)
• peeing outside the litter box
• licking the genital area a lot

If you see any of these, call your vet the same day. A straining male cat is an emergency.

Medical reasons cats pee outside the litter box

• Feline idiopathic cystitis (FIC). This is bladder inflammation with no other cause found, and Cornell says it’s the most common diagnosis in cats with urinary signs. It’s strongly linked to stress.
• Bladder stones and crystals. The two most common types are struvite and calcium oxalate.
• Urethral plugs. These are mixtures of mucus, crystals and cells that can block the urethra, mainly in male cats.
• Urinary tract infections (UTIs). True bacterial infections are less common than people think in young, healthy cats. They’re more often seen in older cats, especially those with kidney disease or diabetes.
• Conditions that make cats pee more, like kidney disease, diabetes and an overactive thyroid, can make it hard to reach the tray in time.
• Pain or stiffness. Arthritis can make climbing into a high-sided tray hard, especially for older cats.

Cornell lists risk factors for urinary disease including being middle-aged and overweight, getting little exercise, drinking little water, using an indoor litter box, being male, and stress, for example in multi-cat homes or after a house move.

Litter box problems

If your vet rules out a medical cause, look at the litter box. The ASPCA highlights these common issues:

• It’s not clean enough. The ASPCA says virtually all cats like clean litter boxes, and recommends scooping at least once a day and washing the box weekly with mild soap or baking soda.
• Too few boxes. Provide one box per cat, plus one extra.
• Bad location. Avoid noisy, busy spots and places right next to food bowls. Put boxes on each floor of the house.
• The wrong litter. The ASPCA says most cats prefer unscented, clumping litter with a medium-to-fine texture. Sudden changes of litter can put cats off.
• Lids and liners. The ASPCA notes most cats don’t like box liners or lids.
• The box is too small or too high-sided, especially for big or older cats.

Spraying vs peeing: what’s the difference?

	Spraying (urine marking)	Peeing outside the box
Where	Vertical surfaces: walls, doors, furniture, curtains	Flat surfaces: beds, carpets, clothes, baths
Amount	Small amounts	A full bladder’s worth
Posture	Standing, tail raised and often quivering, backing up to the object	Squatting
Usual cause	Territory, other cats, stress, not being neutered	Medical problem, litter box problem, stress

The ASPCA explains that spraying is a form of indirect communication, and that cat-to-cat conflict is one of the most common reasons for it. Unneutered males have the strongest urge to spray, but neutered males and females can spray too. Neutering is a proven treatment when spraying is about mating.

To reduce spraying:

• Neuter your cat if it isn’t already.
• Block the view of outside cats with blinds or film on low windows.
• Reduce competition in multi-cat homes: separate food, water, beds and litter boxes in different areas, and add perches and hiding places.
• Try a synthetic feline pheromone diffuser. The ASPCA notes these may help reduce stress.
• Ask your vet about medication if marking continues.

Why does my cat pee on my bed (or clothes)?

This is one of the most upsetting places for it to happen, but there’s usually a reason:

• Your bed smells strongly of you, which feels safe to an anxious cat.
• It’s soft and absorbent, which can appeal to a cat that finds peeing painful or dislikes its litter.
• Stress or conflict, such as another cat guarding the litter tray, a new partner, a new pet or a house move
• A medical problem, especially cystitis, which often causes a sudden urge to go

Rule out medical problems first, then look at the litter box setup and any stress. While you work on it, keep the bedroom door closed or cover the bed with a waterproof sheet.

How to prevent urinary problems

• Help your cat drink more. Cornell recommends fresh water at all times. Many cats drink more from a water fountain or a wide bowl placed away from food. Many vets also recommend wet food to increase water intake.
• Feed small, frequent meals and keep your cat at a healthy weight. See maintaining a healthy cat weight.
• Reduce stress with play, hiding places, perches and predictable routines. Cornell recommends environmental enrichment and outlets for play.
• Keep litter boxes clean, with enough of them in quiet places.
• Special urinary diets: prescription foods can help dissolve or prevent certain crystals and stones, but they should be used on your vet’s advice, after urine tests. Cornell notes there’s no evidence that “urinary health” foods reduce urinary problems in cats in general.

How to clean cat pee properly

• Use an enzyme cleaner made for pet urine, which breaks down the smell. Ordinary cleaners don’t.
• Avoid ammonia-based cleaners. The ASPCA warns that their smell is similar to urine and can draw your cat back to the same spot.
• Blot, don’t rub, and treat the area thoroughly, including underneath carpets or mattresses where needed.

Never punish your cat for peeing outside the box. The ASPCA warns that scolding or rubbing its nose in it can increase fear of the litter box and make the problem worse.

FAQs

Why is my cat suddenly peeing outside the litter box?

Sudden changes are most often caused by a medical problem, such as cystitis, bladder stones or an infection, or by stress or a change to the litter box. See your vet first, then check the litter, the box location and any recent changes at home.

What are the signs of a UTI in a cat?

Straining, peeing small amounts often, blood in the urine, crying while peeing, peeing outside the box and licking the genital area. Many cats with these signs actually have cystitis rather than an infection, so a vet urine test is needed to find out.

Can a cat UTI go away on its own?

Don’t wait to find out. Some bouts of cystitis settle, but they often come back, and infections and stones need treatment. A male cat that is straining may be blocked, which can be fatal within a day or two, so it’s an emergency.

Why is my neutered cat spraying?

Neutered cats can still spray, usually because of stress or conflict, often with other cats inside or outside the home. Block views of outdoor cats, give each cat its own resources, and talk to your vet.

Why does my cat pee on my bed?

Often because of a medical problem, stress, conflict with another cat, or a dislike of the litter box. Your bed smells of you and is soft and absorbent. Rule out medical causes with your vet first.

How many litter boxes do I need?

One per cat, plus one extra, in different quiet locations. That’s the rule recommended by the ASPCA and Cornell.

Sources

• Cornell Feline Health Center: Feline lower urinary tract disease
• ASPCA: Litter box problems
• ASPCA: Urine marking in cats