Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Why Are My Cat’s Gums Red and Swollen? 8 Possible Reasons & What to Do

Cat with red, swollen an inflamed gums or resorption of teeth in felines and gingivitis showing teeth

Owning a cat has its ups and downs, and unfortunately, most of the downs occur when our pets are sick.

When your cat has dental issues, it can sometimes indicate an underlying health problem. Either way, dental complications can have serious ramifications for their overall health.

If your cat has red and swollen gums, read on as we cover the different causes and the steps that you’ll need to take to ensure that your cat is safe and healthy.

divider 3 paws

The 8 Possible Reasons Why Your Cat’s Gums Are Red and Swollen

1. Gingivitis

Gingivitis is one of the most common dental issues that show up as red and swollen gums. It’s an indication of inflammation in the gums, often caused by a buildup of plaque and associated bacteria along the gum line.

Signs of gingivitis include:
  • Red and swollen gums
  • Bad breath
  • Notable plaque on the teeth
It’s caused by a variety of things including:
  • Tooth crowding
  • Inadequate oral hygiene
  • Underlying illness
  • Certain viruses

Gingivitis can be mild to severe and will need professional treatment by a vet, particularly if it’s severe.


2. Periodontitis

Periodontal-Disease-in-Cats
You are free to use this image but we do require you to link back to Catster.com for credit

When gingivitis isn’t treated, it will advance to periodontitis, which is an irreversible condition.

The tissue between the gums and teeth is weakened by the bacteria and the inflammation from the body’s immune reaction. This leads to tooth loss and loose teeth, which is why taking care of your cat’s teeth is so critical, particularly if they have gingivitis!


3. Stomatitis

Stomatitis is a disease that causes painful and severe inflammation throughout the cat’s mouth.

The signs of stomatitis include::
  • Bad breath
  • Excessive drooling
  • Red, inflamed gums
  • Lack of grooming
  • Dropping food from the mouth
  • Crying while eating
  • Loss of appetite
  • Weight loss

The cause isn’t entirely known, but treatment can include a complete professional dental cleaning by your vet, as well as various medications. In some cases, tooth extraction might be necessary.

vet checking cats teeth
Image Credit: PRESSLAB, Shutterstock

4.  Toxins

Several toxins can cause a cat’s gums to become red.

Signs of cyanide poisoning, for example, might include:
  • Red gums
  • Vomiting
  • Panting
  • Difficulty breathing
  • Dilated pupils

A cat can become poisoned by cyanide by eating specific plants, pesticides, fertilizers, or apple seeds, leaves, or stems, though this is not commonly seen in cats.


5.  Underlying Condition

Several conditions can contribute to inflamed gums and lead to gingivitis. This includes feline immunodeficiency virus, feline leukemia virus, feline calicivirus, and kidney failure. A few of these conditions can also cause ulcerations on the tongue and gums.

close up examining cat's mouth with swollen gums
Image By: mojahata, Shutterstock

6.  Heatstroke

A cat suffering from heatstroke can have reddened gums. The normal body temperature for a cat is 99°F to 102.5°F (37–39°C), so if their core body temperature goes over this, they can potentially suffer from heatstroke.

Signs of heatstroke can include:
  • Reddened gums
  • Disorientation
  • Vomiting/diarrhea
  • Difficulty breathing
  • Panting and wheezing
  • Seizures
  • Collapse

Heat stroke is an emergency situation and requires medical help immediately!


7. Teething

Kittens go through teething twice: when their baby teeth come in and when their adult teeth come in.

Signs that your kitten is teething are:
  • Chewing on everything
  • Bad breath

Teething is perfectly normal, and you can buy toys made for teething kittens or freeze something like a damp and clean washcloth and let them chew it, as this can provide relief. You can also consult a vet for more tips to help your kitten through teething.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's an online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money

8. Tooth Resorption

Tooth resorption occurs when a tooth breaks down and becomes absorbed by the body. This leads to tooth loss. The cause isn’t known, but cats are more likely to suffer from tooth resorption as they mature, and other teeth are often affected in the future.

Signs of tooth resorption are:
  • Difficulty chewing
  • Chattering jaw while eating
  • Dropping food while eating

Treatment might include extracting the affected teeth, but unfortunately, there isn’t any known way to prevent it. Some cats show no outward signs of suffering from tooth resorption, so annual physical exams are important to detect these types of dental issues.

divider 3 paws

What to Do to Keep Your Cat’s Teeth and Gums Healthy

Unfortunately, a few of the conditions on this list can’t be prevented, but many can. The most important thing that you can do for your cat is take care of their teeth.

  • Brush your cat’s teeth with a toothbrush and toothpaste made for cats. Don’t use anything but products for cats, as human toothpaste has ingredients that are toxic to felines. Brushing your cat’s teeth at least several times a week will keep their teeth and gums healthy and give you the opportunity to check their gums for any potential issues.
  • Invest in dental treats that your cat enjoys, as they will help prevent plaque and tartar buildup.
  • Take your cat to a vet annually. They can check your cat’s teeth and give them a professional dental cleaning under anesthesia.

divider 3 paws

Conclusion

Cats with red and swollen gums are often experiencing dental problems. Some are worse than others, but unless they’re teething, they will need a veterinarian’s attention. If you believe that your cat has gingivitis, it can likely be resolved with diligent at-home dental care under veterinary guidance.

Regularly checking your cat’s teeth and gums should help stop many problems before they start.


Featured Image Credit: Yaya Photos, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Explaining Cat Behavior Problems: (With 9 Vet-Approved Solutions)

Veterinarians are regularly asked how to deal with certain cat behavior problems, such as peeing outside the litter box, attacking people, chasing other...

Why Does My Cat Suck on My Fingers? 3 Vet-Reviewed Reasons

Cat parents understand that felines are peculiar creatures who sometimes engage in odd behaviors, such as napping in tight spaces, head-bumping you, and...

7 Famous Seafaring Ship Cats That Sailed The Seven Seas

Did you know cats have been traveling aboard ships for thousands of years? Cats are no strangers to the sea; even ancient Egyptian...

Turkish Van Cat Breed Info: Pictures, Temperament & Traits

The Turkish Van is an ancient breed with mythological origins. They’re athletic, highly energetic felines with a strong draw to mischief. This is...

More related

Snowshoe Cat Price: How Much Do They Cost? 2025 Update

Snowshoe cats are rare and are a bit more expensive than most other breeds. Because of this, you can expect the price of...

Can Cats Get Sick From Dogs? Ailments & Prevention Tips (Vet Answer)

If your dog is sick, it’s easy to wonder if your cat might also get sick. Fortunately, while some ailments and infections can...

What Happens When Cats Fall Out of High Windows? (Vet-Answer)

Cats, despite being agile creatures, can fall out of windows by accident. High-rise syndrome, also called falling cat syndrome, is a veterinary term...

How to Restrain a Cat for Nail Clipping: Vet-Approved Safety Tips

Whether you already know it or not, cats scratching things is an instinctive behavior. While their claws provide defense, they also allow cats...

Keep reading

UK Cat Chipping Law: What Is It & What You Need to Know (Vet-Verified)

It’s been on the cards ever since dog microchipping became compulsory in the UK, and as of June 2024, it is now a legal requirement that all pet cats in England are microchipped before they reach the age of 20...

Microchiping cat in vet clinic by veterinarians

How to Stop Your Cat From Climbing the Curtains: 11 Vet-Reviewed Ways

Cats can get up to all kinds of mischief around our homes—not out of spite but because they’re trying to release pent-up energy, explore something new and interesting, or simply enjoy themselves. For example, the curtains might be your pride...

Are Corn Plants Toxic to Cats? Our Vet-Approved Advice

The corn plant, Dracaena fragrans, goes by many names, including the ribbon plant, the dragon tree, and the cornstalk plant, but this plant is still toxic to cats by any other name. It’s also harmful to dogs and horses. Keep...

Catster_Are Corn Plants Toxic to Cats

Why Does My Cat Scratch Around Their Food Bowl? 4 Likely Reasons

If you’ve ever had a cat, you know that they can be very particular about their food. They may sniff it, walk away, and come back to it multiple times before they finally decide to take a bite. And, as...

birman cat eating

16 Common Household Items Cats Like to Play With

Are you tired of spending money on toys your cat doesn’t like? Maybe your cat likes it for a few days but loses interest after a while. What if you stopped buying cat toys and instead started using items you...

cute ginger cat sitting in a paper bag and looking curious sideways

My Cat Coughing Sounds Like a Duck, What’s Wrong? Vet-Verified Facts

If your cat has recently been coughing, you may wonder if something is going on that requires a veterinary examination, particularly if your companion’s cough sounds like they’re channeling a duck. The sounds cats make when coughing can often be...

A cat with this mouth open, about to vomit.

How to Tell Whether a Male Cat Is Fixed: Vet-Verified Facts & Neuter Info

There is no centralized organization maintaining an accurate headcount of cats in shelters, so the best numbers we have for the total shelter cat population in the United States are estimates. According to the president and CEO of the Humane...

Are Fiddle-Leaf Figs Toxic to Cats? Vet-Reviewed Houseplants Examined

With over 400,000 different land plant species on our beautiful green planet, indoor plants have become extremely popular. 1 Plants clean the air that you live in, are low maintenance, reduce noise, look nice, and add life to any space....

Catster_Are Are Fiddle-Leaf Figs Toxic to Cats