What is this fast-growing lump on my dog and when should I see a vet?

Question

Could you give me an idea what this growth may be ? It's gotten larger in the last two days. Pet's info: Dog | Chihuahua | Male | unneutered | 8 lbs

Andrea M. Brodie, DVM · Accepted Answer

This could be a little pus-filled pimple, a cyst or a little abscess. It could also be a wart or other small tumor. Unfortunately I would have to palpate it in order to give you a more specific answer. I suggest you make an appointment with your vet and have this mass examined. If it is a solid mass, your vet may want to do a little biopsy harvesting cells from the mass with a fine needle which will determine whether this is a growth that will need to be removed. If this "pimple" has some content such as pus, fluid or grease then he may want to empty it.

What is this fast-growing lump on my dog and when should I see a vet?

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