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Why does my spayed dog have a changing bump on her lower belly?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Female | spayed | 3 years and 4 months old | 7 lbs

My dog has recently developed like a bump or bulge on her lower abdominal area. The size changes daily it'll either be small and just looks swollen other days its pretty large. She's been spayed for 2 years but this is recent

2 Answers

Most Helpful Answer

David Elbeze, DVM, MRCVS

Answered By David Elbeze, DVM, MRCVS

Veterinarian

Published on June 14th, 2017

This is probably due to a severe allergy, although it could also be fleas or mites. First of all, in order to rule out skin parasites, you will need to treat Molly with a high quality flea treatment (e.g. Trifexis or Advantage), then get her to 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 discovering the cause of the allergy. Some medications can be given by the vet in order to repair the skin lesions (steroids and antibiotics). simultaneously you should start her on a prescription hypoallergenic diet for at least 2 months. Hopefully you will see some results after all this, if not you and your vet should consider putting her on a long term allergy treatment (Atopica or Apoquel).
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Related Answers from Veterinarians

  • Answered By Penelope Graben, DVM

    Veterinarian

    Published on September 19th, 2019

    Hello,

    It would be helpful to know how long ago Molly was spayed. It's possible there is an infection along the incision, or perhaps delayed reaction to the suture material. I'd recommend having Molly seen by her veterinarian. They can best guide you after a physical exam.
    I hope this is helpful. Thanks for using Petco Pet Education Center, formerly Petcoach.

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    1Pet Parents found this answer helpful

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