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My dog has a leg bump that looks like a blister. What should I do?

Updated On September 23rd, 2025

Pet's info: Dog | Pit Bull Terrier | Female | unspayed | 3 years old | 58 lbs

My dog had a bump inside her leg. It looks like a blister but has been there for a few weeks. It doesn't seem to bother her but I can't tell if it has gotten larger.

3 Answers

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on February 5th, 2017

This bump on Aspen's leg could be a cyst, a lipoma, a benign tumor, or a malignant tumor. Any suspicious bumps should be examined by the vet. The vet can perform a test called a fine needle aspirate on it. To do this, the vet sticks a small needle into the bump to get a sample of it's cells, and examines the cells on a slide under a microscope. It's usually painless to the animal, and relatively quick to perform. I would take Aspen into the vet tomorrow to have the bump examined and diagnosed so it can be treated.

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Other Answers

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    Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS

    Veterinarian

    Published on April 2nd, 2018

    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.

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    Answered By Ana M, DVM

    Veterinarian

    Published on September 14th, 2019

    Thank you for submitting your question regarding Chorong. I recommend that she sees her veterinarian. She appears to have a small mass under her skin. Her veterinarian will examine her and likely recommend a procedure known as a fine needle aspirate. This is where a small needle is used to collect a smaple of cells to evaluate under the microscope. This will allow the doctor to know if the mass is benign or cancerous. From there, a treatment plan can be made if necessary. I hope this information helps!

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