swollen lower lip in cats

swollen lower lip in cats

While our pussy can be fun to look at, it looks like a Kardashian because of the almost swollen lower lip. It can actually be a concern. A swollen lower lip in cats could be a condition called a rodent ulcer. Mind you, this is not a condition caused by mice!

Very funny? You better start reading this article and let’s find out what the heck this Kardashian-like illness is all about!

Is it really rodents?

Not absolutely not! Your cat’s swollen lips could be the result of a condition called eosinophilic granuloma.

But here’s a fun fact! Did you know that in the early days, before medicine was so advanced, rodent bites were actually believed to cause swollen lips in cats? Hence the name rodent ulcer!

Ulcers are often associated with stomach problems, but apparently the word ulcer is actually a general term referring to a fault or “rupture” in the membrane of an organ in the body that prevents that particular organ from performing its normal function. .

In this case, a cat’s swollen lip is an ulcer with many possible causes. We will learn more about these reasons in the following paragraphs!


What causes swollen lips in cats?

allergic reaction

This can happen when your cat is bitten by a parasite such as a mosquito, flea or mite. The saliva of these parasites alerts the cat’s immune system.

change diet

Some cat owners will consider a sudden change in diet as a possible cause. Especially if switching from a good quality natural grain free cat food to one of significantly lower quality. Although this is rare, when it comes to changing your cat’s diet, it’s best to closely watch her reaction to introduced cat food.

it’s in the genes

They don’t have a complete picture of the condition yet, but some researchers will tell you that it can be inherited. Same as the item above, get the condition

Are you your worst enemy?

This happens when your cat’s immune system is trying to do its job, in this case, directly affecting your cat’s mouth. Your cat’s lower lip swelling is just a sign that your cat’s immune system is working, it’s just reacting a bit there. In more scientific terms, this is known as an autoimmune reaction, in which the cat’s immune system mistakes other parts of itself for foreign bodies.

What can we do?

The condition can range from sores to ulcers to blisters and can sometimes even be disfiguring in some cats. This is a very painful skin condition, especially in the more severe cases, so here’s a little about how we can help. Swollen Lower Lip in Cats:

Go to the vet

We always say that in any case it is best to consult your veterinarian about the condition of your cat. In this case, your cat will be prescribed some medications and antibiotics. You will find these labels: prednisone, clindamycin, and clavamox.


Severe cases may require surgery to heal the ulcer. It is also important to avoid delaying the consultation and to seek the advice of an expert as soon as sores, blisters or ulcers appear.

long term treatment

Severely affected cats may require long-term treatment and require close monitoring. It’s helpful if you’ve already identified what’s causing your cat’s swollen lower lip so you can avoid its triggers as well.

proper nutrition and hygiene

To combat other external factors, make sure your cat is eating a healthy diet and always check for fleas and other parasites that may be feeding on her little body.

other reasons

While we may have discussed ulcers in rodents at length, we have not ruled out other causes such as:

dental problems

Swollen teeth can lead to oral infections in cats. This is a completely different condition, but it can still cause your cat’s lips to swell.


Since feline acne is a condition that causes swelling in the affected area, we should not ignore this condition either.

Remember that all the data presented here is just a compilation of information from the internet, be careful when using it. Always consult an expert before making a decision about the health of your pets.

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