Top 10 Signs Your Dog Might Be in Pain (And What to Do About It)

6. Aggression or Withdrawal

Dogs are usually creatures of habit. When a friendly, social dog suddenly becomes aggressive, growls when touched, or hides away from family members, it’s often a sign that something is wrong.

Aggression in these cases isn’t about a bad attitude—it’s a defensive reaction to pain. Just like humans snap when we’re hurting, dogs may growl or avoid interaction to protect themselves.

Why Pain Can Cause Behavior Changes

1. Defensive Instincts – When a painful area is touched, a dog may instinctively snap or growl to prevent further discomfort.

• Fear of Worsening the Pain – Dogs learn quickly; if moving or being touched caused pain once, they may avoid interaction altogether.

• Exhaustion From Chronic Pain – Constant discomfort can make a dog irritable, withdrawn, or depressed.

• Underlying Illness – Painful conditions like arthritis, dental disease, ear infections, or injuries can trigger personality changes.

Signs Your Dog’s Aggression is Pain-Related

• Growling or snapping when touched in a specific area.

• Sudden dislike of being picked up, brushed, or cuddled.

• Choosing to hide or stay alone instead of joining family activities.

• Aggression that appears out of character for your dog.

• Refusal to play with toys or other pets due to discomfort.

These behaviors are often defensive, not signs of a “bad dog.”

What You Should Do

• Respect Their Space – Don’t force interaction or discipline them for growling. Growling is communication, not misbehavior.

• Avoid Touching Painful Areas – Wait until a vet can safely examine your dog.

• Take Note of Triggers – Record when aggression happens (during petting, play, grooming, or resting).

• Stay Calm – Responding with anger or fear can make your dog more anxious and defensive.

Veterinary Care

Your vet will perform a full physical exam to check for pain sources. They may recommend:

• Pain relief medication to reduce discomfort.

• X-rays or imaging to detect joint or internal issues.

• Treatment for infections or injuries if identified.

• Behavioral support if the aggression has become habitual.