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My puppy has a swollen nipple lump. Could a bug bite be the cause?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Female | unspayed | 4 months and 24 days old | 37 lbs

My puppy, who is a little less than five months old, has a swollen lump-like thing in her nipple. It looks like mammary tumor (I had an older dog that had this condition) except that it looks like there might be a bug bite on top of it. Can bug bites cause this kind of lumpy swelling?

1 Answer

Most Helpful Answer

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Answered By Dr. Strydom, DVM

Veterinarian

Published on April 18th, 2020

I have never seen a bug bite cause inflammation of a mammary gland. Swelling is usually from mastitis - some type of infection and/or inflammation got into the teat. Please take her the vet for an exam. The vet needs to see her in person.

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