My 1-year-old dog has a growing pimple in her armpit. What is it?

Question

My 1 year old healer has a pimple/blister in her armpit. It started out small but has doubled in size in the last week. She has had it for about a month. Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Female | spayed | 1 year old

Ricardo Fernandez, DVM · Accepted Answer

Thanks for using Petco Pet Education Center, formerly Petcoach! This could be a benign or malignant growth. 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 night!

My 1-year-old dog has a growing pimple in her armpit. What is it?

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