Petco Text Logo
Petco Pet Logo

Why is my female dog's mammary gland suddenly swollen and not painful?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Female | unspayed | 60 lbs

female dog 6 years old with a swollen mammory gland that just showed up within the hour not painful from what i can tell

1 Answer

Most Helpful Answer

Image profile

Answered By Andrea M. Brodie, DVM

Veterinarian

Published on September 25th, 2018

If a mammary gland swells up within an hour the cause is usually either trauma, or an insect bite or even a snake bite. If the swelling has been there for a longer time or developed over a longer time, then this could be a cyst or an abscess or a mammary tumor. Observe it, and if it does not get smaller over the next 48 hours, take Baby to your veterinarian for an exam.

Vote icon

2Pet Parents found this answer helpful

image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Sponsored