Why is my cat's upper lip swollen with no injury? Can I treat it?
Updated On September 23rd, 2025
Pet's info: Cat | Domestic Longhair | Female | 7 months and 6 days old | 5 lbs
My cat's upper lip is swollen, there's no wounds or scanning on it and nothing wrong inside of her mouth. It just randomly got swollen. I don't know what's wrong and I can't afford a trip to the vet at the moment.
4 Answers
Most Helpful Answer
Published on September 20th, 2017
She could have an eosinophilic granuloma which is common in cats and can be caused by an allergic response. The lesion may become ulcerated and is typically treated with a corticosteroid. If she has any fleas then she should be treated for fleas. You could also put her on a hypoallergenic diet and see if that helps. Try to find a low cost clinic or a vet that would take a payment plan so you can get her treated. If she just needs a corticosteroid then it shouldn't be very expensive. Hope she gets better soon!
2Pet Parents found this answer helpful
Related Answers from Veterinarians
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Published on February 11th, 2018
This looks very inflamed, it is probably a condition called "rodent ulcer", it's an autoimmune/allergic condition, often it does not bother them until it is very serious. there are no home remedies for this, the treatment is with steroids, this will need to wait until you take him to the vet.
6Pet Parents found this answer helpful
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Published on October 1st, 2017
Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Poor Nyla, she is so cute! There are few possible causes for her swollen lip. Has she been excessively grooming? If she has then the swelling could be from that. Fleas and allergies can cause excessive grooming. Also cats can have this reaction to ceramic food and water bowel. I recommend changing to stainless steal bowls. And the last possibility is allergies in general. Cats are unique (in many ways!) in that they can develop eosinophilic granuloma complexes that can look like that. If Nyla isn't excessively grooming and there aren't any fleas make an appointment with your Vet to see if steroids are warranted to make her more comfortable. Then change her food bowls. A new hypoallergenic diet may also be needed if the swelling returns. I hope this helps and I wish Nyla a speedy recovery!
9Pet Parents found this answer helpful
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Published on April 8th, 2018
This looks like a tumor. Cats do get eosinophic granulomas on their lower lips but usually they are firm, pink and do not bleed. Since she’s a senior cat I recommend a veterinary exam to see it this can be treated with medicine to make it smaller or if surgical removal is needed. This looks painful and irritating so that is probably why she doesn’t want to eat much. She can get dehydrated and sick if she doesn’t start to eat soon so please take her in to find out what treatment is recommended. Thanks for using Petco Pet Education Center, formerly Petcoach to help you care for Callie.
1Pet Parents found this answer helpful
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