A Cat Grinding Its Teeth Needs a Vet Check

Teeth grinding in a cat deserves a veterinary check, even if your cat still eats. Grinding—also called bruxism—involves the upper and lower teeth rubbing from side to side. You may hear clicking or see the lower jaw moving sideways. Oral disease and pain are important causes, though pain elsewhere in the body can also trigger it. PetMD’s guide, drawing on a veterinary dentistry specialist, and Animal Dental Care & Oral Surgery explain these connections.

The sound alone cannot tell you the cause. Your next step depends on the context and accompanying signs.

Watch, call or go now

Watch: familiar bird-watching chatter, not grinding

A cat rapidly opening and closing its mouth while staring at birds through a window may be showing normal prey-focused chattering. Chirps often accompany it. If this is your cat’s familiar behavior, stops when the interest passes, and there are no eating or health changes, observation is reasonable.

New or noticeably increased chattering should still be checked by a vet, according to Cats Protection. If you hear one brief sound and are unsure what it was, record the context and watch the next meal. If it happens again or you remain unsure, call rather than assuming it is harmless chatter.

Call a vet: new or recurrent grinding

Contact your clinic promptly to arrange an examination for new or recurrent grinding, including episodes during meals or at rest. Do not wait for your cat to stop eating.

Ask for same-day advice if your cat is refusing food, struggling to chew or swallow, drooling heavily, pawing at the mouth, or showing blood in the saliva. These are recognized signs of feline dental disease and oral discomfort. Tell the clinic about vomiting, reduced activity or other changes too; they may affect how soon your cat needs assessment.

Go now: emergency signs alongside the grinding

Seek emergency veterinary care for difficulty breathing or open-mouth breathing, collapse, severe bleeding, or significant head or facial trauma. Suspected poisoning also requires immediate veterinary contact—do not wait for more symptoms. These are emergencies in their own right, not evidence that the grinding has a particular cause. VCA’s feline emergency guidance supports these thresholds.

Why a cat may grind its teeth

Problems a vet may investigate include tooth resorption, inflamed gums, damaged teeth, mouth ulcers and abnormal tooth alignment. Jaw-joint problems can also produce clicking. Less obvious causes include painful abdominal disease; the noise does not automatically mean the problem is dental. PetMD describes these possibilities.

Eating normally does not rule out oral pain. With tooth resorption, a cat may continue approaching food but drop pieces, chew on one side, swallow kibble without chewing, or suddenly prefer soft food. Cornell’s Feline Health Center emphasizes watching how the cat eats, not just whether it eats. A kitten’s age is not a reason to dismiss grinding: young cats can have gum disease, and alignment problems can occur in young cats too.

What to do before the appointment

• Take a short video, if you can do so without disturbing your cat. Include the sound and jaw movement.
• Note the pattern: during eating, resting or watching wildlife; how often it happens; and whether it is becoming more frequent.
• Record food intake and behavior: dropped food, one-sided chewing, drooling, vomiting, hiding or reduced activity.
• Do not pry the mouth open, probe teeth or scrape tartar. Let the vet perform the examination.
• Pause brushing a painful mouth until the vet advises you. Brushing severely inflamed gums can hurt, as Cornell explains.
• Do not give human painkillers or leftover pet pain medicine without veterinary direction. The FDA warns that these may harm pets.

The vet may recommend a detailed oral examination and dental X-rays under anesthesia because some disease is hidden below the gumline. VCA explains why these examinations matter. Treatment depends on the findings; a dental product or home cleaning cannot repair a painful damaged tooth. See our guide to cat dental problems for the signs and likely next steps.

This guide provides general information, not a diagnosis or treatment plan for an individual cat.