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

Why Pets Hide Pain

In the wild, showing vulnerability can attract predators or signal weakness to rivals. Even domesticated dogs and cats retain this instinct, often continuing to eat, move, and interact socially despite significant underlying discomfort. This means owners cannot rely on dramatic signals to know something is wrong.

Understanding this biology is the first step toward becoming a more observant caregiver. The changes that indicate pain are frequently quiet and gradual — a slight shift in how your dog rises from rest, or a cat choosing a new sleeping spot to avoid pressure on a sore limb. As noted in our guide on behavioral changes that may signal health problems, what looks like a mood or personality shift can actually be a physical symptom.

Behavioral Signs to Watch For

Behavioral changes are often the earliest and most consistent indicators of pain in pets. Key patterns to monitor include:

• Withdrawal and hiding: A social pet that suddenly prefers solitude may be in discomfort and instinctively seeking safety.
• Reduced interaction or play: Reluctance to engage in activities the animal previously enjoyed is a meaningful change.
• Increased irritability or aggression: A normally gentle pet that growls, snaps, or hisses when touched — especially in a specific area — may be guarding a painful spot.
• Disrupted sleep patterns: Restlessness, frequent repositioning at night, or difficulty settling can all reflect underlying pain.
• Changes in grooming: Cats may excessively lick a painful area, or neglect grooming altogether. Dogs may chew persistently at a limb or joint.

For dog owners, pairing this awareness with an understanding of body language can sharpen your ability to detect subtle distress signals. Our dog body language field guide offers practical visual cues to help interpret what your dog communicates physically.

Physical Signs That May Indicate Pain

Alongside behavioral shifts, certain physical changes are important to recognize:

• Changes in posture or gait: Limping, stiffness after rest, reluctance to climb stairs, or an arched back can indicate musculoskeletal or abdominal pain.
• Altered facial expression: Veterinary researchers have developed pain assessment tools based on facial cues — squinting eyes, tense brow muscles, and pulled-back ears are associated with pain in both cats and dogs.
• Decreased appetite or water intake: Dental pain, nausea from internal discomfort, or general illness can all suppress interest in food and water.
• Changes in breathing: Shallow, rapid, or labored breathing at rest — without exertion or heat — can signal pain or serious illness.
• Unusual posture during elimination: Straining, crying out, or adopting an abnormal stance when urinating or defecating may indicate urinary tract, gastrointestinal, or musculoskeletal pain.

Older animals may display particularly subtle signs. Our overview of senior pet care after age seven covers how aging shifts the baseline for what is normal, making owner vigilance even more critical.

What To Do If You Suspect Your Pet Is in Pain

If you notice one or more of these signs, the appropriate first step is to contact your veterinarian. Describe what you have observed in as much detail as possible — duration, frequency, and context all help your vet narrow down the cause. Do not attempt to self-diagnose or self-treat.

Critical safety note: Never administer human pain medications — including ibuprofen, acetaminophen, or aspirin — to pets. These substances are toxic to dogs and cats and can cause organ failure. Only use medications that your veterinarian has explicitly prescribed for your individual pet.

For pets with known chronic conditions such as arthritis, weight management is a meaningful supportive measure. Excess body weight places additional stress on joints and can worsen pain. Our resource on keeping your pet at a healthy weight outlines practical strategies for gradual, safe weight management under veterinary guidance.

This article is for general informational and educational purposes only and does not constitute veterinary or medical advice. Always consult a licensed veterinarian for concerns about your pet's health, pain, or treatment options.