Signs Your Pet May Be in Pain — and What to Do

Why Pets Don't Show Pain the Way We Expect

Most animals are instinctively wired to hide weakness — a survival trait inherited from wild ancestors. That means your cat or dog may be experiencing significant discomfort while still eating, greeting you at the door, or going through a mostly normal routine. By the time a pet yelps or limps visibly, the issue has often been present for a while.

This is why recognizing subtle signs of pain matters. It's less about watching for dramatic distress and more about noticing when something feels slightly off. Think of it as pattern recognition: you know your pet's baseline, and any meaningful departure from it deserves attention.

See our guide to pet body language for a broader look at how animals communicate their internal states without words.

Behavioral and Physical Signs to Watch For

Pain in pets tends to show up across two categories: behavioral changes and physical signs. Neither list is exhaustive, and any single sign on its own may not be cause for alarm — but a cluster of changes, or anything that persists beyond a day or two, warrants a call to your veterinarian.

Behavioral Changes

• Withdrawal or hiding: A normally social pet retreating to corners or refusing interaction is a common pain response. This can also overlap with stress — see how everyday stress shows up in pets for context.
• Decreased appetite or thirst: Skipping meals occasionally is one thing, but consistent disinterest in food often signals something worth investigating.
• Restlessness or difficulty settling: A pet that can't seem to get comfortable — repositioning frequently, pacing at night — may be trying to relieve pain. Nighttime restlessness and behavioral changes can sometimes look like a training issue but are actually medical.
• Increased aggression or irritability: A normally easygoing pet that snaps, hisses, or growls when touched may be protecting a painful area.
• Excessive licking, chewing, or grooming: Pets often focus on a painful spot by licking it obsessively, even if the source is internal.
• Changes in posture or gait: Hunching, guarding one limb, reluctance to jump or climb stairs — these are classic indicators.

Physical Signs

• Rapid, shallow breathing or panting without exertion
• Squinting or partially closed eyes
• Dilated pupils
• Visible trembling or muscle tension
• Swelling, warmth, or tenderness in a specific area

Gradual changes are especially easy to dismiss as normal aging. The article on gradual behavioral changes explores which slow shifts deserve professional attention.

What to Do When You Suspect Your Pet Is in Pain

If you notice one or more of the signs above — especially if they persist or worsen — here's a practical approach:

1. Document what you're seeing. Note when the behavior started, how often it occurs, and any other changes. This information helps your vet assess the situation more accurately.
2. Avoid home remedies or human pain medications. Many over-the-counter pain relievers that are safe for humans — including ibuprofen and acetaminophen — are toxic to pets. Do not administer any medication without direct veterinary guidance.
3. Contact your veterinarian. Describe the signs you've observed. Your vet can advise whether the situation requires an urgent visit or a scheduled appointment.
4. Minimize activity until assessed. If your pet appears uncomfortable, limit physical exertion that could worsen an underlying injury or condition.
5. Watch for emergency signs. Labored breathing, collapse, uncontrolled bleeding, or inability to stand require immediate emergency veterinary care — don't wait.

For dog-specific pain signals, reading the signs your dog is in pain goes deeper into breed-specific nuances and subtler cues many owners miss.

This article is for general informational purposes only and is not a substitute for professional veterinary advice. Always consult a licensed veterinarian for concerns about your pet's health.