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My dog's nipple has a lump and brown/green discharge. Should I worry?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | unspayed | 6 years and 8 months old | 9 lbs

i squeezed my dogs nipple and 5 of them came out white like milk yet one has a lump in the side of it. yet when is squeezed the sixth nipple the discharge cam out brown/green mixed with white.(this nipple did not have the lump). we got the lump check out by a vet. she said it was nothing to worry about

1 Answer

Most Helpful Answer

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Answered By Jenna Beyer, DVM, MBA, cVMA

Veterinarian, Certified Veterinary Acupuncturist

Published on August 6th, 2019

If Linda isn't pregnant or hasn't recently given birth, she shouldn't be making milk. Abnormal colors in the discharge could indicate infection or inflammation in the gland. The only way to know what a lump is caused by is to take a sample for examination under a microscope or submit a biopsy to a pathologist. I would recommend having Linda re-examined by the vet with this new information or get a second opinion.

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