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My cat has spreading blisters on her belly, is it from new litter?

Updated on September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Female | spayed | 10 years and 5 months old | 14 lbs

I noticed what looks like blisters on my cats belly.. started with 2 and now its spreading fast. Only thing I've done differently was litter. Her name is Zen and she is 10 years young. I'm taking her to the local vet tomorrow but I'm losing sleep over this. I'm very worried. I don't believe she is in pain. She lets me hold her and her appetite hasn't changed.

3 Answers

Most Helpful Answer

Dr. Massimo Orioles, DVM, Cert AVP, MRCVS

Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS

Veterinarian

Published on November 24th, 2019

Hi, and thanks for your question. This could be due to an allergy, although it could also be infection or mites. First of all, in order to rule out skin parasites, you will need to treat with a high quality flea treatment, then ask the vet to perform a skin scrape - this might reveal an infection or a mite infestation. If all of those came back negative, the next step is to treat the allergy symptomatically and try to discover the cause of the allergy. Three main type of allergies are usually affecting pets: food allergies, flea and parasite related ones and environmental type (allergens coming from trees, pollens, dust etc etc). Some medications can be given by the vet in order to repair any possible skin lesions (like steroids and antibiotics). Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further. If this answer was helpful please let us know, this will be used to improve our service!
Vote Icon4Pet Parents found this answer helpful

Related Answers from Veterinarians

  • Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS

    Veterinarian

    Published on August 17th, 2017

    These are scabs and would be caused by an inflammatory process affecting the skin.
    This is probably due to an allergy, although it could also be infection or mites.
    First of all, in order to rule out skin parasites, you will need to treat with a high quality flea treatment (advocate or advantage), then ask the vet to perform a skin scrape - this might reveal an infection or a mite infestation.
    If all of those came back negative, the next step is to treat the allergy symptomatically and try to discover the cause of the allergy.
    Three main type of allergies are usually affecting pets: food allergies, flea and parasite related ones and environmental type (allergens coming from trees, pollens, dust etc etc).
    Some medications can be given by the vet in order to repair any possible skin lesions (like steroids and antibiotics).
    Please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.

    Vote Icon

    1Pet Parents found this answer helpful

  • Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS

    Veterinarian

    Published on November 1st, 2018

    Hi, and thanks for your question.
    This is probably due to an allergy, although it could also be infection or mites.
    First of all, in order to rule out skin parasites, you will need to treat with a high quality flea treatment, then ask the vet to perform a skin scrape - this might reveal an infection or a mite infestation.
    If all of those came back negative, the next step is to treat the allergy symptomatically and try to discover the cause of the allergy.
    Three main type of allergies are usually affecting pets: food allergies, flea and parasite related ones and environmental type (allergens coming from trees, pollens, dust etc etc).
    Some medications can be given by the vet in order to repair any possible skin lesions (like steroids and antibiotics).
    Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.

    Vote Icon

    1Pet Parents found this answer helpful

Smart Picks for Smart Questions

Vet Q & A
My cat has a red, scabby belly rash. Could it be new food or litter?
In an older pet who is just now experiencing allergy type symptoms, I would definitely suspect that it could be either the new litter, new food or a combination of both that is causing this. I would start with changing the litter back to the normal litter that you used to use. As for the skin, you can try bathing Billy in a hypoallergenic shampoo (Duoxo calm shampoo) or oatmeal based shampoo. However, Billy may need a steroid shot by your vet to calm things down. If the change in litter doesn't cause resolution of the skin, then I would suggest changing the food back. I hope you can get Billy's skin back to normal soon!
Updated on September 23rd, 2025
Health & Wellness
Why is my cat licking her stomach after a burst blister healed?
Hi, and thanks for your question. This presentation could be due to a trauma or localized spot of skin infection (likely to be caused by bacteria). A check up, appropriate disinfection and possibly antibiotics (oral, topical or in a shampoo formulation) are needed to solve the problem. Disinfection may be started at home with very diluted hibiscrub or betadine or salted water baths. Buster collar may be useful as well to avoid any licking/scratching (if any). Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further. If this answer was helpful please let us know, this will be used to improve our service!
Updated on September 23rd, 2025
Vet Q & A
What's causing my cat's bald, weepy patches on her belly skin?
This is probably caused by an allergic reaction. first of all make sure you de-flea Lily regularly every month with a high quality spot on (ex. Advantage) as fleas are by far the most common reason for these reactions. If the fleas are not the problem, it could be an allergic reaction to food or an environmental factor. this is more complicated to treat and will sometimes require medications such as Steroids, anti histamines or cyclosporin in order to stop the allergy.
Updated on September 23rd, 2025
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My cat has tail scabs and vomits after new food. Is it allergies?
Hi, and thanks for your question. This could be due to an allergy, although it could also be infection or mites. First of all, in order to rule out skin parasites, you will need to treat with a high quality flea treatment, then ask the vet to perform a skin scrape - this might reveal an infection or a mite infestation. If all of those came back negative, the next step is to treat the allergy symptomatically and try to discover the cause of the allergy. Three main type of allergies are usually affecting pets: food allergies, flea and parasite related ones and environmental type (allergens coming from trees, pollens, dust etc etc). Some medications can be given by the vet in order to repair any possible skin lesions (like steroids and antibiotics). Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further. If this answer was helpful please let us know, this will be used to improve our service!
Updated on September 23rd, 2025
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My cat has an itchy belly with dots. What can I use before the vet?
Thanks for using Petco Pet Education Center, formerly Petcoach! This is possibly due to allergies. A secondary infection is likely and also needs to be addressed. A topical is not likely to be of much help here. You could consider using an e-collar to prevent licking if that is currently an issue. There are many things that can cause allergies though in most cases they can be broken down into 3 big categories: flea, food and environmental allergies. Allergies are usually worked up in a stepwise fashion starting with flea allergies as this is the easiest and cheapest to take care of. If not on a flea preventative, then it would be a good idea to get started on one. If already on one then it would be a good idea to change to something else (there are many new products out in the market). If not improved in 1-3 months then it is time to move on and check for food allergies by switching to a novel diet (new protein and new carbohydrate). If that does not seem to be the issue then you are left out having to check for environmental allergies which require blood and/or skin tests. Allergies can be very frustrating to deal with at first but so rewarding at the end when we are able to treat them effectively!
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My cat has a sore on her upper lip. Is it an allergy or an ulcer?
Hi, and thanks for your question. This could be due to an allergy, although it could also be infection or mites. I don't think it looks like an ulcer. First of all, in order to rule out skin parasites, you will need to treat with a high quality flea treatment, then ask the vet to perform a skin scrape - this might reveal an infection or a mite infestation. If all of those came back negative, the next step is to treat the allergy symptomatically and try to discover the cause of the allergy. Three main type of allergies are usually affecting pets: food allergies, flea and parasite related ones and environmental type (allergens coming from trees, pollens, dust etc etc). Some medications can be given by the vet in order to repair any possible skin lesions (like steroids and antibiotics). Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further. If this answer was helpful please let us know, this will be used to improve our service!
Updated on September 23rd, 2025
Vet Q & A
My cat has black patches on his stomach. What's the best treatment?
Hi, and thanks for your question. Even though a picture would help to understand better the underlying cause, This presentation could be due to a trauma or localized spot of skin infection (likely to be caused by bacteria or mites). A check up, appropriate disinfection and possibly antibiotics (oral, topical or in a shampoo formulation) are needed to solve the problem. Disinfection may be started at home with very diluted hibiscrub or betadine or salted water baths. Buster collar may be useful as well to avoid any licking. Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further. If this answer was helpful please let us know, this will be used to improve our service!
Updated on September 23rd, 2025

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