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Blood blisters on a cat

Species: Cat
Breed: Moggy
Age: 11-15 years
My cat has developed what appear to be blood blisters, one just below her nose and another on her bottom lip. They become quite engorged until they burst, and then bleed profusely. Once the bleeding ceases they fill with blood again. They do not appear to cause the cat any extreme discomfort, but they worry me nonetheless. What could be causing these vesicles and what can be done?


Online vet, Dr. Marie

Dr. Marie replied:

This is an unusual situation.

I have seen cats get ulcers on their lips. These are usually something called eosinophilic ulcers (or rodent ulcers) and they are treated with steroid injections from your vet.

However, these don't burst open and bleed. In fact there is no common condition that can cause what you are describing.

There is a possibility that these are cancerous growths. It is also possible that she has a rare condition called pemphigus.

I would highly advise you see your vet about this condition. They should be able to tell you whether or not you should be worried and may be able to do something to help.

If you would like to reply I can give you an email address where you can send pictures to and I can see if I can help you out any more.

Dr. Marie.

---This question was asked in our Ask A Vet For Free section.---


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Disclaimer: Although Dr. Marie is a qualified veterinarian, the information found on this site is not meant to replace the advice of your own veterinarian. AskAVetQuestion.com and Dr. Marie do not accept any responsibility for any loss, damage, injury, death, or disease which may arise from reliance on information contained on this site. Do not use information found on this site for diagnosing or treating your pet. Anything you read here is for information only.

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Dr. MarieDr. Marie is a veterinarian who practices in a busy animal hospital in Ottawa, Ontario. She created Ask A Vet Question as a resource for good, accurate veterinary advice online. Dr. Marie treats dogs, cats, hamsters, guinea pigs, and rats. She has been a vet since 1999.

Is an online vet visit just as good as a trip to your veterinarian? No! But, many times, asking an online veterinarian a question can help save you money. While Dr. Marie can't officially diagnose your pet or prescribe medications, she can often advise you on whether a vet visit is necessary. You can also ask Dr. Marie for a second opinion on your pet's condition.