Dogs evolved to hide pain — a vulnerable animal in the wild that displays weakness risks becoming prey. That instinct remains, which means your dog can be in significant pain while appearing "fine." Here's what to actually look for.
Why Dogs Hide Pain
This isn't stubbornness or a desire to not worry you. Dogs instinctively suppress behavioral pain signals because those signals historically attracted predators. A limping, vocalizing dog in the wild is a target. So dogs compensate, carry on, and hide discomfort until it becomes severe enough that they can't mask it.
This means that by the time a dog is obviously limping, whimpering, or refusing to move, the pain is often significant and has been present for longer than the obvious symptoms suggest.
12 Signs Your Dog Is in Pain
1. Changes in posture and movement
A dog in pain often carries themselves differently — hunched back, tucked abdomen, lowered head carriage, or a stiff, careful gait. Watch for subtle changes: a dog that previously bounced up stairs now takes them slowly, or stands with their weight shifted off one leg even when standing still.
2. Reluctance to be touched in specific areas
A dog who flinches, growls, or moves away when you touch a specific area — particularly if this is new behavior — is communicating that the area hurts. This includes pulling away from collar contact (neck pain), reluctance to have the hind end handled (hip or back pain), or reacting to paw handling (injury, infection, or joint pain).
3. Changes in appetite
Pain — particularly oral pain, abdominal pain, or generalized musculoskeletal pain — frequently suppresses appetite. A dog who suddenly becomes a picky eater or reduces food intake without other obvious explanation warrants investigation.
4. Excessive licking or chewing at a body part
Dogs lick and chew at painful areas instinctively. Persistent attention to a specific paw, joint, abdomen, or area of the body — especially when the skin looks normal — often indicates underlying pain rather than an external irritant.
5. Behavioral changes — aggression or withdrawal
Pain-induced aggression is one of the most common causes of sudden aggression in previously non-aggressive dogs. A dog who growls or snaps when touched, picked up, or approached in certain positions is often hurting, not having a behavior problem. Similarly, a normally social dog who suddenly withdraws, hides, or stops interacting with family members is a dog who doesn't feel well.
6. Changes in sleeping position or frequency
Dogs in pain often sleep more (a natural pain response) or change their preferred sleeping position to accommodate a painful area. A dog who previously slept on their side now sleeps sitting up or in an unusual posture may be experiencing chest, abdominal, or joint pain that makes lying flat uncomfortable.
7. Altered facial expressions
Research has produced validated pain scales for dogs based on facial changes. Pain-associated facial changes include: partially closed eyes, flattened ears, tense forehead, tightened muzzle, and a generally dull or glazed eye appearance. The "pain face" is a real and measurable phenomenon in dogs.
8. Changes in breathing
Rapid, shallow breathing at rest — especially if it's new — can indicate pain. Panting without a heat or excitement explanation is a common pain signal that owners misread as "just hot" or "just happy."
9. Reluctance to jump, climb stairs, or get up from resting
One of the earliest signs of joint pain — particularly hip dysplasia, elbow dysplasia, or early arthritis — is reluctance to perform movements that were previously effortless. Many owners attribute this to "getting older" without realizing the dog is uncomfortable. Getting older doesn't have to mean being in pain; a dog struggling to rise may be a dog who needs a pain assessment.
10. Restlessness and inability to settle
A dog who paces, gets up and lies down repeatedly, can't find a comfortable position, or seems unable to relax may be in pain. Abdominal pain in particular often produces restlessness as the dog tries to find a position that relieves pressure.
11. Vocalization — but not always
Whimpering, whining, and yelping when touched or moving are obvious pain signals. But many dogs in significant pain vocalize rarely or never. Absence of vocalization does not mean absence of pain.
12. Changes in grooming behavior
A dog who stops grooming themselves (dull, unkempt coat) is often a dog who feels unwell. Conversely, excessive licking at a specific area (as above) can indicate localized pain or irritation.
When to See a Vet
Any new or unexplained behavioral change in a dog warrants at minimum a phone call to your vet. Changes in appetite, mobility, social behavior, or posture — especially in combination — should prompt an in-person evaluation. Pain is almost always easier and less expensive to address early than after it has progressed.
If you suspect your dog is in pain, don't administer human pain medications. Ibuprofen, acetaminophen (Tylenol), and naproxen are all toxic to dogs and can cause kidney failure, liver failure, or gastric hemorrhage at doses that might seem minor. Only use medications specifically prescribed for your dog by a veterinarian.