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Why is my senior dog's head lump sometimes soft and sometimes hard?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Male | unneutered | 13 years and 1 month old | 18 lbs

I Have a 13 year old peekaboo and he has a lump in the back of his head. Sometimes it's soft and mushy and sometimes it's rock hard.

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1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on August 13th, 2018

There are a couple of things this lump on ND's head could be including a cyst, lipoma, benign tumor, or a malignant tumor. Unfortunately in a senior dog, a malignant tumor is always a possibility. Any suspicious lumps 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 lump to get a sample of its cells, and examines the cells on a slide under a microscope. It's usually painless to the animal, and relatively quick to perform. Once the cause of the lump is diagnosed, the vet can discuss treatment options if needed. Give the vet a call first thing in the morning to make an appointment for him. I hope this helps!

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