Why Cats Are So Good at Hiding Pain
In the wild, showing weakness makes you a target. Predators look for the slow, the limping, the obviously sick. This survival instinct is hardwired into your domestic cat, even though the most dangerous predator in your house is probably the vacuum cleaner. The result? Cats are phenomenally good at masking discomfort, and by the time most owners notice something's wrong, the problem has often been going on for a while.
I learned this the hard way with my cat Luna. She had a urinary tract issue that must have been bothering her for days before I noticed any change at all. The signs were there — I just didn't know what to look for.
1. Changes in Facial Expression
Researchers have developed a "Feline Grimace Scale" — a validated tool for assessing pain based on facial cues. Cats in pain often have ears rotated outward or flattened, squinted or tense eyes, a tense muzzle with whiskers held away from the face, and a head position lower than usual. Take a moment now to observe your cat's relaxed face so you have a baseline for comparison.
2. Decreased Appetite or Changed Eating Habits
A cat who suddenly loses interest in food — especially one who normally lives for mealtime — may be dealing with pain. Dental pain in particular can cause cats to approach their bowl eagerly but eat tentatively, drop food, or tilt their head while chewing. Watch for shifts in preference too. A cat who suddenly refuses dry food but still eats wet food might have a toothache.
3. Hiding More Than Usual
When cats don't feel well, they retreat. If your normally social cat starts spending entire days under the bed or in the back of a closet, pay attention. This is one of the most common and most overlooked signs of pain in cats. A vulnerable cat hides — it's pure instinct.
4. Changes in Grooming Behavior
This goes both directions. A cat in pain may stop grooming altogether, leading to a dull, unkempt coat. Alternatively, cats may over-groom a specific painful area. You might notice thinning fur, bald spots, or raw skin where they've been licking obsessively. Cats with urinary pain often over-groom their lower abdomen.
5. Altered Litter Box Habits
A cat with arthritis might struggle to climb into a high-sided box. Urinary pain causes more frequent trips or straining. Cats in pain may start eliminating outside the box — not out of spite, but because getting there is difficult or they associate the box with pain. If your previously reliable cat starts having accidents, think pain before behavior problem.
6. Increased Vocalization — Or Unusual Silence
Some hurting cats vocalize more: unusual yowling, growling, or hissing, especially when touched. Others who are normally chatty become unusually quiet. Either change from baseline is worth noting.
7. Aggression or Irritability
A formerly gentle cat who starts biting or scratching when picked up or petted might be telling you something hurts. This is reactionary — they're not becoming mean, they're protecting a painful body part. Pay attention to whether aggression is triggered by touching a specific area.
8. Changes in Posture or Movement
Cats in pain may adopt a hunched posture with their back arched and legs tucked underneath. They might be reluctant to jump, hesitate on stairs, or move stiffly. Sometimes the change is subtle — maybe they're taking the long way to their favorite windowsill instead of making the direct jump. A cat who used to bound up the cat tree and now only uses lower platforms might have joint pain.
9. Purring
This catches people off guard. We associate purring with happiness, but cats also purr when they're in pain or distressed. It's a self-soothing mechanism, and the vibration frequency may actually promote healing. If your cat is purring but also showing other signs on this list, don't assume the purring means they're fine.
10. Restlessness or Inability to Get Comfortable
A cat who keeps shifting positions, gets up and lies down repeatedly, or can't seem to settle might be trying to find a position that doesn't hurt. This is especially common with abdominal or urinary pain.
11. Changes in Sleep Patterns
A cat sleeping significantly more than usual might be in pain. Sleep can be an escape from discomfort. Conversely, pain can cause restless sleep or difficulty settling down.
12. Withdrawal from Interaction
Beyond hiding, a cat in pain may stop engaging with you or other pets. They might not greet you at the door, stop playing, ignore beloved toys, or simply avoid being touched. A general decrease in engagement with the world is one of the most reliable indicators something isn't right.
What to Do If You Suspect Pain
First, never give your cat human pain medication. Acetaminophen (Tylenol) is lethal to cats. Ibuprofen is extremely dangerous. Even aspirin is risky without proper veterinary dosing.
If you're seeing one or more of these signs, schedule a vet visit. Write down what you've observed, when changes started, and any relevant details. Videos can be incredibly helpful — capture unusual movement or behavior on camera to show the vet.
For acute situations — obvious injury, extreme distress, inability to urinate — seek emergency care immediately.
The Value of Knowing Your Cat's Baseline
The thread connecting all 12 signs is change. What makes them hard to spot isn't that they're invisible — it's that you have to know what's normal for your specific cat to recognize when something shifts. Spend intentional time observing your cat. How do they normally move? Where do they sleep? How much do they groom? That knowledge is your most powerful diagnostic tool — one that no vet can replicate because nobody spends as much time with your cat as you do.
Cats don't have the luxury of telling us when they hurt. But they do communicate, in their own quiet way. Our job is to pay close enough attention to hear them.