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Cat dental disease guide

Dental Disease & Mouth Pain in Cats

What to notice, what to track, and what to ask your vet if your cat has bad breath, drooling, dropping food, chewing differently, grooming less, losing weight, hiding, or seeming picky.

Your job is not to diagnose this yourself. It is to notice that the pattern changed, know which signs cannot wait, track what is happening, and bring that information to your veterinarian.

Start with urgent signsWhat to track
Start here
1

Do not dismiss “still eating”

A cat can be in real mouth pain and still eat, especially if they adapt how or what they eat.

2

Notice changed patterns

Bad breath, drooling, dropped food, chewing changes, and grooming loss are worth documenting.

3

Know what cannot wait

Not eating, heavy drooling, bleeding, swelling, trouble breathing, or string in the mouth needs fast guidance.

Your cat may still be eating. That does not mean their mouth is comfortable.

This is the thing that catches many caring cat people off guard: mouth pain in cats often does not look like a cat refusing all food. It may look like bad breath that has gotten worse, drooling, or food dropped beside the bowl. It may look like chewing on one side, turning the head while eating, refusing dry food but eating wet food, or eating treats while leaving meals untouched.

It can also look like grooming less, hiding more, acting irritable, or quietly losing weight. The cat is still eating something, so it is easy to assume things are not that bad.

One common reason for these changes is dental or mouth disease, which can be genuinely painful. But appetite and eating changes can also come from kidney disease, hyperthyroidism, diabetes, nausea, pain elsewhere, or another illness.

This guide can help you

✓Recognize signs of possible mouth pain, even in a cat who is still eating.
✓Know which signs need prompt or emergency care.
✓Understand common dental and oral problems in cats.
✓Document what you are seeing for your vet.

This guide cannot

!Diagnose dental disease or mouth pain.
!Tell you how severe your cat’s pain is.
!Replace an oral exam, dental x-rays, bloodwork, or veterinary care.
!Tell you whether the eating change is dental disease, kidney disease, hyperthyroidism, diabetes, nausea, or something else.
One quick cross-warning: if your cat is straining in the litter box, making repeated trips, crying, or producing little or no urine, that is not dental. That may be a urinary emergency, especially in male cats, and should not wait.
If this is happening now

Most dental disease is gradual. Some mouth signs should not wait.

Most dental and mouth changes call for a prompt veterinary appointment rather than an emergency visit. But not eating, heavy drooling, bleeding, swelling, trouble breathing, trauma, toxins, or string in the mouth need faster help.

Call your veterinarian promptly

!Persistent bad breath, drooling, dropping food, chewing differently, avoiding hard food, or eating only treats or tiny amounts.
!Pawing at the mouth, red or swollen gums, loose, broken, missing, or discolored teeth.
!Reduced grooming, weight loss, a visible mouth sore or growth, or behavior changes alongside eating changes.

Seek same-day or emergency care

!Not eating at all, eating almost nothing, drooling heavily, bloody saliva, or bleeding from the mouth.
!Facial swelling, swelling under an eye, sudden severe mouth pain, jaw injury, oral trauma, or trouble swallowing.
!Holding the jaw open, seeming unable to close the mouth, trouble breathing, or possible toxin or caustic exposure.
!Something stuck in the mouth, or string or thread visible under the tongue or coming from the mouth.
Do not pull on string or thread coming from the mouth. That can be dangerous. Call a veterinarian.
Not eating still matters on a dental page.
A cat who eats nothing for about a day, or very little for more than a day, should prompt a call to the veterinarian. Cats who go too long without enough food can be at risk for hepatic lipidosis, especially if they are overweight, diabetic, already ill, or medically fragile.
Still eating can be misleading

A cat can be in real mouth pain and still eat.

This is the heart of the page. The drive to eat is strong, and cats are good at hiding pain. Instead of refusing food outright, a cat with mouth pain may adapt.

Changed chewing

Swallowing kibble whole, chewing only on one side, dropping food, tilting the head while eating, or making odd jaw movements.

Changed food choices

Refusing dry food but eating wet food, eating treats while leaving regular meals, eating slowly, or walking away after a few bites.

Still interested, but not eating normally

Seeming hungry, approaching the bowl, then not eating can be a pain, nausea, or illness clue.

You did not miss something obvious

Many caregivers only realize how much pain their cat had after treatment, when the cat eats more comfortably, grooms better, or seems brighter.

The takeaway:
If the eating pattern changed, it matters, even if your cat is still eating something.
What you may notice

The signs often cluster around eating, the mouth, grooming, and behavior.

These changes can suggest mouth pain, but nausea and other illnesses can look similar. The pattern is the reason to call, not a diagnosis.

Eating and chewing

Dropping food, chewing on one side, turning the head while eating, avoiding dry food, preferring wet food, eating slowly, pawing at the mouth, or odd jaw movements.

Mouth and face

Bad breath, drooling, bloody saliva, red or swollen gums, loose or broken teeth, mouth ulcers, facial swelling, or a sore, growth, or non-healing area.

Grooming and coat

Grooming less, matted or unkempt coat, greasy coat, dirty rear, resisting brushing, or resisting face handling.

Body and behavior

Weight loss, hiding, irritability, sleeping more, less social behavior, pulling away when the face or mouth is touched, or acting quieter or “older.”

Bad breath is not just “old cat breath.”
Persistent foul breath is usually a sign of disease, often dental, though other illnesses can also affect breath odor.
Common dental and mouth problems

You do not need to diagnose these from home.

It helps to recognize the names your vet may use and why dental x-rays or anesthesia may be discussed.

Gingivitis and periodontal disease

Gingivitis is inflammation of the gums. Periodontal disease can damage the tissues and bone that support the teeth and may lead to loose teeth, infection, pain, and tooth loss.

Tooth resorption

Tooth resorption is a common feline dental problem where the tooth structure breaks down. It can be painful and may be hidden below the gumline.

Stomatitis

Feline chronic gingivostomatitis is severe, widespread, painful inflammation of the mouth. Some cats with severe stomatitis need many or all teeth removed to reduce pain and inflammation.

Broken teeth and abscesses

Broken teeth can expose sensitive inner structures. A tooth-root abscess may show up as facial swelling or swelling under an eye and may be mistaken for an eye problem.

Mouth ulcers

Mouth ulcers can come from stomatitis, feline calicivirus, kidney disease, caustic exposure, immune-mediated disease, or another illness.

Oral masses or growths

Most mouth problems are not cancer, but oral masses, non-healing sores, bleeding, facial swelling, bad breath, drooling, and weight loss should be evaluated.

A note on calicivirus

Calicivirus is one possible cause of mouth ulcers or oral inflammation.

It is not the same as ordinary tartar, tooth resorption, or periodontal disease, and it is not something to diagnose at home.

Mention the whole pattern.
Feline calicivirus can cause painful ulcers on the tongue, gums, lips, hard palate, or mouth lining. It often comes with respiratory signs such as sneezing, nasal discharge, eye discharge, fever, drooling, or reduced appetite. If your cat has mouth ulcers along with these signs, mention all of them to your vet.
Tooth loss and extractions

Removing painful teeth often makes cats more comfortable, not less.

If you have seen rescue posts about cats losing many teeth, this part can sound frightening. The calmer reality is more useful.

Extractions are not casual

Cats may need teeth removed because of tooth resorption, advanced periodontal disease, broken teeth, abscesses, or severe stomatitis. These are veterinary decisions based on exam findings, dental x-rays, pain, infection, and tooth health.

Cats can adapt well

Many cats eat well once healed, sometimes with soft food temporarily if the vet recommends it. For cats with severe stomatitis, extractions can lead to major improvement, though not every cat is fully cured.

If your vet recommends removing teeth, it is not a failure.
It may be the thing that gives a hurting cat real relief. Ask questions about anesthesia, pain control, dental x-rays, recovery, costs, and what eating may look like afterward.
What not to do at home

A sore mouth tempts well-meaning home fixes, but several can do real harm.

There is no safe way to treat significant mouth pain at home. The relief your cat needs starts with a veterinary exam.

Do not give unsafe medications

Do not give human pain medicine, acetaminophen, ibuprofen or other human NSAIDs, leftover antibiotics, old medications, or supplements in place of veterinary care.

Do not force or scrape

Do not try to pull a loose tooth, force the mouth open if your cat is painful, scrape or scale tartar at home, or delay care because your cat still eats treats.

Do not use unsafe mouth products

Do not use human toothpaste, essential oils, or unproven home remedies in the mouth. Human toothpaste is not meant to be swallowed, and cats cannot rinse and spit.

Do not rely on anesthesia-free dentistry

Anesthesia-free dentistry cannot properly evaluate below the gumline, take dental x-rays, or treat painful disease. It is not a substitute for veterinary dental care.

Poison help
Pet Poison Helpline: 1-855-764-7661. ASPCA Animal Poison Control: 1-888-426-4435. Both are available 24/7; a consultation fee may apply.
Before calling or visiting the vet

What to document before calling or visiting the vet

Your notes help your vet understand the pattern and decide what testing is needed.

Eating pattern

When eating changed, which foods are refused, whether treats are accepted, wet versus dry preferences, dropping food, chewing on one side, and head tilting while eating.

Mouth signs

Drooling, bloody saliva, worsening bad breath, pawing at the mouth, visible gum redness, loose or broken teeth, facial swelling, or a visible sore or growth.

Whole-body pattern

Grooming changes, weight changes, hiding, behavior changes, vomiting or nausea signs, water intake changes, and litter box changes.

History and safe visuals

Current medications, supplements, known conditions, FIV/FeLV status if known, and photos or videos only if useful and safe. Do not force the mouth open.

Daily tracking

What to track day to day

Simple daily tracking can help you and your veterinarian see whether things are stable, improving, or getting worse.

The tracker does not diagnose, score, monitor, or interpret medical data. It also does not replace an oral exam, dental x-rays, bloodwork, or your veterinarian’s guidance.

Use it to log:

Appetite
Foods refused
Chewing changes
Dropping food
Drooling
Bad breath
Grooming
Weight
Water intake
Vomiting
Behavior / hiding
Pain signs

Use Notes for details like “dropped kibble while eating,” “ate wet food but refused dry,” “chewed only on left side,” “drooled after dinner,” “bad breath worse this week,” or “not eating today, called vet.”

Tracking should never delay care. If your cat is not eating, losing weight quickly, drooling heavily, bleeding, swollen, weak, dehydrated, or clearly in pain, call first and log later.

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Vet conversation

Questions to ask your vet

You do not need to ask everything in one visit. Choose the questions that fit your cat and the moment.

If you are overwhelmed, start with these three:

1

Could mouth or dental pain explain what I’m seeing, and what kind of oral exam does my cat need?

2

Could these eating or behavior changes be from something else, such as kidney disease, hyperthyroidism, diabetes, pancreatitis, nausea, or pain elsewhere?

3

If a dental procedure is needed, what are the anesthesia risks for my cat, and what safety steps do you take?

Do you see signs of gingivitis, periodontal disease, tooth resorption, stomatitis, broken teeth, abscess, ulcers, or an oral mass?
Are dental x-rays needed to see below the gumline?
Could calicivirus, FIV, FeLV, kidney disease, or another condition be contributing to ulcers or inflammation?
Should we run bloodwork or a urine test before anesthesia or to look for other causes of appetite changes?
Does anything need to be biopsied?
What pain control will be used during and after care?
Might extractions be needed?
If teeth are removed, what will eating look like afterward?
What signs after a procedure should make me call?
What home dental care do you recommend after healing?
Should I look for VOHC-accepted products?
If cost is a concern, what is most urgent, and can care be staged?
After veterinary guidance

Daily care after veterinary guidance

Medication, dental procedures, anesthesia, recovery plans, and home dental routines should be guided by your veterinary team.

After a dental procedure

Your vet may discuss pain medication, feeding adjustments such as soft food temporarily, appetite monitoring, follow-up visits, and signs that should prompt a call.

Home dental care

Tooth brushing, cat-specific toothpaste, dental diets, treats, water additives, or VOHC-accepted products may be discussed after healing if appropriate.

Senior-cat safety

Age alone is not a disease, but senior cats can have hidden conditions that affect anesthesia planning. Your vet may recommend bloodwork and tailored monitoring.

The better anesthesia question

Instead of only asking whether your cat is too old, ask how needed dental care can be handled as safely as possible and what the risks are of leaving pain or infection untreated.

Common worries

Common worries you may be carrying

“Is bad breath normal?”

No. Persistent bad breath is not normal aging. It is often a sign of dental disease or another medical issue and is worth checking.

“My cat is still eating. Could there still be mouth pain?”

Yes. Cats commonly eat through significant mouth pain. Watch how your cat eats, not only whether your cat eats.

“Why is my cat dropping food?”

Dropping food can happen when chewing hurts because of a sore tooth, inflamed gums, an ulcer, an abscess, or a growth.

“Why does my cat eat treats but not regular food?”

Treats may be softer, smaller, smellier, or more tempting. Eating treats does not rule out pain, nausea, or illness.

“Why would a cat need teeth removed?”

Teeth may need removal if they are painful, broken, loose, infected, resorbing, or contributing to severe inflammation.

“Can cats eat without teeth?”

Yes. Many cats adapt well after extractions and are noticeably more comfortable once painful teeth are gone. Most eat well after healing.

“What is tooth resorption?”

Tooth resorption is a common feline condition where the tooth structure breaks down. It can be painful and may be hidden below the gumline.

“What is stomatitis?”

Stomatitis is severe, painful, widespread mouth inflammation. It can be difficult to manage and may involve immune overreaction, plaque, and sometimes viral associations such as calicivirus.

“Is dental anesthesia safe for a senior cat?”

Age itself is not a disease, but senior cats may have hidden conditions. Ask about pre-anesthesia bloodwork, monitoring, fluids, pain control, and how your vet weighs the risks of anesthesia against untreated pain and infection.

“How do I know it is dental pain and not kidney disease, diabetes, hyperthyroidism, or nausea?”

You often cannot tell from home. The signs overlap. An oral exam and appropriate testing help separate them.

“What if I can’t afford a full dental?”

Ask your vet what is most urgent, what can be staged, and what options exist. Cost is a reason to ask about priorities, not a reason to stay silent.

Trusted resources

Trusted resources for deeper reading

These resources are for deeper reading. They do not replace veterinary care.

Vet school overview

Cornell Feline Health Center — Feline Dental Disease

A clear vet-school overview of common feline dental diseases, including gingivitis, periodontitis, and tooth resorption.

Visit Cornell
Tooth resorption

Cornell Feline Health Center — Tooth Resorption

Cat-specific information on one of the most common and painful causes of feline tooth loss.

Visit Cornell
Bad breath

Cornell Feline Health Center — Bad Breath: Sign of Illness?

Useful caregiver guidance on why persistent bad breath should not be dismissed.

Visit Cornell
Calicivirus

Cornell Baker Institute — Feline Calicivirus

Background on feline calicivirus, including mouth ulcers and appetite changes.

Visit Cornell
Cat-specific guidance

International Cat Care — Dental Disease in Cats

Cat-specific caregiver guidance on dental disease and signs to watch for.

Visit iCatCare
Stomatitis

VCA Animal Hospitals — Gingivitis and Stomatitis in Cats

Accessible explanation of gingivitis, stomatitis, oral pain, and reduced grooming.

Visit VCA
Abscess

VCA Animal Hospitals — Tooth Root Abscess in Cats

Useful background on tooth-root abscesses and facial swelling.

Visit VCA
Medication safety

FDA — Get the Facts about Pain Relievers for Pets

Safety guidance on human pain relievers, including why acetaminophen should never be given to cats.

Visit FDA
Dental safety

American Veterinary Dental College — Anesthesia-Free Dental Cleanings

Explains why anesthesia-free cleanings are not a substitute for veterinary dental care.

Visit AVDC
Dental products

Veterinary Oral Health Council — Accepted Products

Lists dental products that have met VOHC standards for plaque or tartar claims.

Visit VOHC
If your cat's situation looks a little different, these guides may fit better:
Kidney Disease / Appetite & Hydration Changes in CatsHyperthyroidism in Senior CatsDiabetes in CatsHelp With Vet BillsBrowse the full Resource Library

A final note

This guide is a starting point for caregivers, not a diagnosis or treatment plan. Bad breath, dropped food, chewing changes, drooling, grooming less, hiding, and weight loss can have several causes.

The only way to know what is happening and what will help is to have your cat evaluated.

Notice the pattern. Watch for urgent signs. Bring what you are seeing to your veterinarian. And hold onto this: a cat who is still eating can still be hurting. Noticing that something changed, even something small, is exactly the kind of attention that can help your cat get relief.

Last reviewed: June 2026