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My dog has a growing red bump on his head. Is it a tumor or a cyst?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | neutered | 5 years and 9 months old

There's a bump on my dogs head that looks a bit like a pimple. It has been there for over a month. We assumed it was a pimple or something of that sort, but it seemed to be getting larger and redder. Could it be a tumour?

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on February 9th, 2017

Yes, it is possible this bump on Toffee's head could be a tumor, but it could be benign or malignant. It could also be a cyst. 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 have Toffee seen by a vet tomorrow to have the bump examined and diagnosed so it can be treated.

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