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My young female dog has a soft, swollen area on her breast. What is it?

Updated On September 23rd, 2025

Pet's info: Dog | Great Dane | Female | unspayed | 2 years and 6 months old | 100 lbs

My female 1,5 ys old Great Dane has a swollen soft area around breast

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1 Answer

Most Helpful Answer

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Answered By Jessica Keay, DVM

Veterinarian

Published on August 8th, 2017

I am sorry to hear about Chocolat. There are numerous possible causes for this swelling. These could include a pseudopregnancy (where the body for some reason thinks it is pregnant and starts producing milk), mastitis (an infection of a mammary gland), mammary gland hyperplasia (a noncancerous swelling of the mammary tissue), tumors of the mammary gland (not common in dogs this young but not impossible), or a benign tumor such as a fatty tumor such as a lipoma that just happens to be over the area of the mammary chain. I would recommend an exam at your vet to help determine the cause and appropriate treatment. They may recommend an aspirate of the area with a needle to help identify what the cause of the swelling is and how best to treat it.

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