Cat Health · Updated 2026-03-12

Is My Cat In Pain? The Subtle Signs Most Owners Miss

Cats mask pain more effectively than most species. A vet-informed guide to the subtle behavioral changes that almost always mean something is wrong.

Cats are evolutionary masters of hiding discomfort

Domestic cats descend from a solitary ancestor whose survival depended on appearing healthy to competitors and predators. Centuries of domestication have not unwound this. A cat in pain looks, to the untrained eye, like a cat being quiet. By the time most owners notice "something is off," the condition has often been present for weeks.

This guide is the observer's checklist for the subtle signals. It is not a diagnostic tool. It is a prompt to look, and then to call your vet if the prompts keep adding up.

The behavioral signals, in order of how often they're missed

A change in resting position

Cats with chronic pain — arthritis especially — stop lying on their sides. They tuck, hunch, or loaf. They stop stretching after a nap. They develop a preferred side. If your cat has started hiding under furniture they used to sleep on top of, that's a signal even if nothing else has changed.

Reduced jumping and a "new route" around the house

A cat who used to sail onto the kitchen counter now uses the stool. A cat who slept on the bookshelf now prefers the couch. Owners describe this as "slowing down." It is usually pain, most often osteoarthritis, under-diagnosed in cats at alarming rates. Studies suggest more than 60% of cats over ten have radiographic evidence of osteoarthritis, and fewer than 15% are receiving treatment for it.

Changes in grooming

Cats in pain over-groom some areas and under-groom others. A matted spot on the back or the flanks — areas a cat with joint pain can't reach — is one of the most reliable signs in senior cats. Over-grooming on the belly, inner thighs, or a specific limb is the other direction: the cat is self-soothing over a painful area.

Litter box and urination pattern changes

A cat who is painful to step into the box — tall sides, bad approach — will start eliminating nearby. Arthritic cats often need lower-entry boxes. This is a frequent cause of "behavioral" litter box problems. A cat straining to urinate or defecate in a box is a medical signal, not just pain — evaluate urgently.

Changes in social behavior

A cat who was affectionate becoming withdrawn. A cat who was independent becoming clingy. Either direction is noteworthy. Pain changes a cat's relationship with people; the direction of the change depends on the individual.

Ear position and face shape

The Feline Grimace Scale (validated in 2019–2020 research) tracks ear position, eye shape, whisker carriage, and head position. A cat in pain shows ears slightly flattened and outward, eyes partially closed, whiskers pulled forward, and head below shoulder level. Veterinary teams are trained to read it; owners can too. A photograph of your cat at a calm moment and another at a suspicious one, side by side, is often revealing.

Temperament changes

A formerly tolerant cat now hissing when picked up, a cat who objects to being touched near the hips or spine, a cat whose "irritable" behavior appeared gradually. Pain is the single most common cause of new aggression in older cats.

Appetite changes and slower eating

Dental pain is an enormously under-diagnosed cause of subtle signs in cats. Resorptive lesions, a cat-specific dental condition, are reported in 20–40% of cats in surveys. A cat who eats one side of their mouth, who drops kibble, who prefers wet food after years of eating dry — all worth a dental exam under anesthesia.

Not everything is pain

Thyroid disease, cognitive dysfunction, and vision or hearing loss mimic some of these signals. That's not a reason to delay; it's a reason to get a workup. A cat whose behavior is changing needs a vet visit regardless of the likely cause.

What to bring to the vet

• Video of the cat moving — a short clip of them jumping down from furniture is worth more than paragraphs of description
• Weight trend
• A list of the specific signals you've noticed and roughly when they started
• Photos of any grooming changes or matted spots
• Litter box log for a week

Treatment paths

Osteoarthritis in cats is now better-treated than it was five years ago. Solensia (frunevetmab), an injectable monoclonal antibody, has changed the landscape. It is not a replacement for environmental management (softer bedding, lower-entry boxes, ramps) but it is meaningful pharmacotherapy. Traditional NSAIDs in cats require caution — meloxicam in particular has a checkered label history in feline use — but controlled pain management is achievable with the right vet.

Dental pain is surgical. A dental under anesthesia, with full-mouth radiographs, is the only way to diagnose and treat resorptive lesions. Cost ranges widely; this is one of the higher-value spends in cat care.

Where to go next

Pair this with the litter box diagnostic — pain is frequently the unseen cause of "behavioral" elimination issues in senior cats. For new owners, the Cat Care Hub has species-wide reading.

One habit to adopt

Once a month, observe your cat for ten minutes with no distractions. Watch them stretch, jump, walk. You will recalibrate your baseline, and the next subtle change — which is the one that matters — will register faster.