What is this yellow, scabby bump under my dog's arm? Is it serious?

Question

Hey there! My dog has a bump under her right arm that has been there since around mid-December. It started off kinda pimple-like but then grew so now there is a yellow colored scab-like thing coming out of it. Not sure what it is and if it's serious. If you would like a picture, I have one! Thank you! Pet's info: Dog | Yorkshire Terrier | Female | spayed | 13 lbs

Dr. Massimo Orioles, DVM, Cert AVP, MRCVS · Accepted Answer

Hi, and thanks for your question. Although a picture of it would help to determine the underlying cause more specifically, generally speaking this kind of lump/growth needs to be ideally assessed by your veterinarian to have a definitive and specific answer. Usually there are two ways your vet can do that a part from examining it directly during physical examination. A biopsy can be taken under local or general anesthetic, otherwise a smaller sample through a fine needle can be aspirated (this technique is called FNA= fine needle aspiration). Differentials include skin cysts, infections, benign or more sinister type of tumors. Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further. If this answer was helpful please let us know, this will be used to improve our service!

What is this yellow, scabby bump under my dog's arm? Is it serious?

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