The most common reasons cats stay in the litter box
A cat that spends a lot of time lying in the litter box is usually telling you something is wrong—either with the box itself, with their health, or with stress. The most frequent causes are a urinary tract infection or other pain when urinating, a litter box that is too small or dirty, or anxiety from changes in the home. Less often, it signals a digestive issue or early kidney disease. The behavior itself is not normal; cats naturally want to leave the litter box quickly after using it.
Because the underlying reason can range from a straightforward fix (cleaning the box more often) to something that needs a veterinarian (a blocked urinary tract), the first step is always a vet visit. Do not assume it will resolve on its own. A cat that lingers in the box for hours, or visits it constantly without producing much, needs medical attention within a day or two.
Key Takeaways
- A cat lingering in the litter box often signals pain during urination, which can indicate a urinary tract infection, bladder stones, or a urinary blockage that needs when ready veterinary care.
- The litter box itself may be the problem: it is too small, too dirty, in a noisy or stressful location, or filled with litter your cat dislikes.
- Stress from moving, new pets, loud noises, or changes in routine can cause a cat to retreat to the litter box as a safe space.
- Digestive issues, constipation, or early kidney disease can also cause cats to spend unusual amounts of time in the box.
- Schedule a veterinary exam before making other changes, because health problems need to be ruled out first.
Health problems that make cats stay in the litter box
Urinary tract infections and blockages are the most common medical reason. When a cat has pain or difficulty urinating, they may sit in the box longer, straining or going in and out repeatedly. Male cats are at higher risk for urinary blockages, which are a medical emergency—if your male cat is straining without producing urine, or acting lethargic, get to a vet when ready.
Bladder stones, crystals in the urine, and feline idiopathic cystitis (inflammation of the bladder with no clear cause) all produce the same behavior: a cat that seems stuck in the box or visits it constantly. These are painful and require a vet to diagnose. Your cat may also lick the genital area frequently or cry while in the box.
Digestive issues like constipation or diarrhea can also keep a cat in the box. If your cat is straining to defecate or seems uncomfortable, or if you notice loose stool, mention this to your vet. Older cats sometimes develop chronic kidney disease, which can cause them to urinate more often and spend more time in the box. Increased thirst and weight loss often accompany this condition.
When the litter box itself is the problem
Even a healthy cat will avoid or linger in a box that does not meet their needs. Size matters—the box should be at least 1.5 times the length of your cat's body. A box that is too small forces your cat to crouch uncomfortably or hang over the edge, and some cats will stay in a larger box longer because it feels safer.
Cleanliness is critical. Most cats prefer a clean box and will avoid one with clumped urine or feces. If you scoop once a day, try scooping twice. Some cats are sensitive enough that they will sit in the box waiting for you to clean it rather than use a dirty one. A completely soiled box may also harbor bacteria that irritate your cat's skin or paws.
The location and type of litter also matter. A box in a noisy, high-traffic area, near a loud appliance, or in a place where the cat feels trapped can stress your cat into staying put. Similarly, a sudden change in litter brand or texture—even switching from clay to crystal or unscented to scented—can make a cat uncomfortable. If you have changed litter recently, switch back and see if the behavior improves.
Stress and anxiety as a cause
Cats retreat to familiar spaces when they are anxious. The litter box is a place they know well, and some cats will spend time there when they feel unsafe or overwhelmed. Common stressors include a new pet in the home, a new person, moving to a new house, construction noise, or changes to the cat's routine.
If your cat is also hiding, eating less, or acting withdrawn, stress is likely a factor. In these cases, the litter box becomes a refuge. You can help by creating a quiet, safe space away from the stressor—a room with food, water, and a separate litter box where the cat can retreat. Pheromone sprays like Feliway may also reduce anxiety, though they work best alongside removing or reducing the source of stress.
What to do: the veterinary exam comes first
Before you change the litter, move the box, or make any other adjustments, schedule a vet visit. Bring a description of how long this has been happening, whether your cat is straining, how often they visit the box, and any other changes you have noticed (eating, drinking, energy level, other bathroom habits). If your cat has not had bloodwork in the past year, ask the vet whether it makes sense to run it, especially if your cat is older than seven.
The vet will examine your cat's abdomen, check for signs of pain, and may recommend urinalysis or imaging depending on what they find. This rules out infections, blockages, stones, and systemic disease. Once you know your cat is healthy, you can address behavioral or environmental factors with confidence.
Fixes to try after a clean bill of health
If the vet finds no medical problem, start with the litter box itself. Clean it thoroughly with hot water (no ammonia-based cleaners, which smell like urine to cats). Scoop at least twice daily. If the box is small, upgrade to a larger one—storage containers work well and are inexpensive. Some cats prefer boxes without lids; if yours has a hood, try removing it.
If you have changed litter recently, switch back to what your cat used before. If you want to change brands, do it gradually over a week, mixing more of the new litter in each day. Move the box to a quieter, less-trafficked location if possible, away from noisy appliances and the cat's food and water bowls. Cats prefer privacy when using the box, so a corner or enclosed space often works better than an open area.
If stress seems to be the cause, reduce the stressor if you can. If a new pet is the issue, separate them for now and reintroduce slowly. If the stress is unavoidable (construction, a new family member), give your cat a safe room with its own litter box, food, and water, and spend quiet time with them there.
When to call the vet again
If your cat's behavior does not improve within a week or two of making changes, or if new symptoms appear, contact the vet. Straining without producing urine, blood in the urine or stool, vomiting, lethargy, or a sudden increase in drinking or urination all warrant a follow-up visit. Some conditions take time to show up on initial bloodwork, and your vet may want to recheck.
Do not wait if your male cat shows signs of a urinary blockage—inability to urinate, crying in the box, or extreme lethargy. These are emergencies and require same-day care, even if it means going to an emergency clinic after hours.
Frequently Asked Questions
Is it normal for a cat to nap in the litter box?
Occasional napping is less concerning than constant lingering, but it is still unusual. Cats normally leave the box quickly. If your cat is napping there regularly, it may indicate the box is the only place they feel safe, or there is a mild health issue. A vet visit is still worth doing.
My cat keeps going in and out of the litter box without producing much. What does this mean?
Frequent trips with little output often signal a urinary tract problem—infection, stones, or a blockage. This is especially urgent in male cats. Contact your vet the same day if you notice this pattern, particularly if your cat seems uncomfortable or is licking the genital area frequently.
Can a dirty litter box cause a urinary tract infection?
A dirty box does not directly cause a UTI, but it can stress your cat into holding urine longer, which increases infection risk. A clean box and good hydration help prevent UTIs. If your cat already has one, a clean box will make them more comfortable while you treat it.
Should I get a second litter box if my cat is staying in one all the time?
The general rule is one box per cat plus one extra. A second box in a different location gives your cat options and may help if the first box is the problem. However, do not skip the vet visit—a second box will not fix a urinary infection or blockage.
My cat is old and has been doing this for months. Is it just aging?
Older cats do develop kidney disease and other conditions that increase urination, but months of lingering in the box is not a normal part of aging. Chronic kidney disease is manageable with diet and medication once diagnosed. A vet exam and bloodwork are important to catch it early.