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DonnaNewPicCroppedQuestion: My 2 year old male cat has what looks like a swollen upper lip. At first we thought he had a massive overbite, but at closer look it looks to be sore. What could it be and what can we do for him?

Answer: Thanks for your inquiry. There is a condition called the “Eosinophilic Granuloma Complex” which commonly affects young cats and results in a swollen upper or lower lip.

Here is a link to an article about this condition: Eosinophilic Granuloma Complex.

There are other things that could look this way so I would definitely recommend you see your veterinarian for a complete exam and get a diagnosis so you can give your cat some relief from the swelling.

Good luck.
Dr. Donna Spector

Answers provided to pet owners by Dr. Donna Spector should be considered information and not specific advice. Answers are to be used for general information purposes only and not as a substitute for in-person evaluation or specific professional advice from your veterinarian. Communications on this site are very limited and should never be used in possible cases of emergency.

Halo, Purely for Pets will not be liable for any loss or damage caused by your reliance on any information or content contained in a blog or article post.


  1. My two year old male cat has a swollen and red lower lip. It looks like there is a bite mark in the center but it is a single hole , what can I do to help? I am really low on money so I don’t want to take him to the vets if not necessary.

  2. My cat has the same thing But it doesn’t seem to be growing and it has gotten alot smaller but clearly still there and like you I am very low on funds and cannot afford a vet at this time

  3. My cat has a swollen mark on her lower lip like a bee sting or something what can I do to help her I don’t have money to take her to a vet

  4. My cat isn’t even one year old yet and he has a swollen lower lip more on the left side, my mom can’t afford to bring him to the vet and I’m worried about him. He’s my best friend

  5. My 1 year old male cat seems to have one side of his upper lip swollen and it looks irritated and sort of raw he has had it for a couple weeks and we cant take him to the vet is this serious does anyone know???? Can we cure it at home? What are the causes?

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