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My dog has a hard lump near her armpit. Should I take her to the vet?

Updated On September 23rd, 2025

Pet's info: Dog | Chihuahua | Female | spayed | 12 lbs

Hi there my chiuahua is about 7yrs old or so and I just noticed there was a hard lump near her left arm pit area , I'm not sure how long it has been there . She doesn't show symptoms of being sick or in pain but I am worried. Is it something that a vet should check out ?

1 Answer

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on July 5th, 2018

Thanks for using Petco Pet Education Center, formerly Petcoach! This could be a benign or malignant growth. There is no way of knowing what it is just based on its appearance. This is often differentiated by a test called a fine needle aspirate (FNA) which is a pain free, inexpensive and easy procedure which in most cases will help reach a diagnosis. Sometimes a biopsy is needed for a definitive diagnosis. I recommend that you have her evaluated by your veterinarian for further assessment and treatment. I am really hoping for something benign. Good luck and have a good day!

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