Petco Text Logo
Petco Pet Logo

  • Two Easy Ways to Start Earning Rewards!

My dog keeps scratching a lump behind his ear. What could it be?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | neutered | 12 lbs

My dog has a small lump behind his ear that he keeps scratching at.

This question includes photos that may contain sensitive content. Click to view.

View more to consider that the photos may include sensitive content.

1 Answer

Most Helpful Answer

Image profile

Answered By Dr. Dayna, DVM, CVA

Veterinarian, Certified Veterinary Acupuncturist

Published on January 16th, 2018

Thank you for posting the picture of the lump on Leo. There are several possibilities of what it could be but I suspect it is one of 3 things. A sebaceous adenoma which is a benign growth of the oil gland, a cyst, or possibly a tumor called a mast cell tumor. A veterinarian will take a needle aspirate and look at the cells under the microscope to assess if this is something that is concerning or not. If it does look like a mast cell tumor then surgical removal will likely be recommended. Best of luck and I hope it is nothing concerning. Thank you for using Pet Coach.

Vote icon

8Pet Parents found this answer helpful

Related Questions

Petco Pet Education Center
Health & Wellbeing
What fish dog food helps dry skin if my dog eats Science Diet?
Is your dog's dry skin a concern? A certified vet offers expert advice on finding the best fish-based dog food alternatives to Science Diet for essential oils.
Updated on February 04, 2026
Petco Pet Education Center
Health & Wellbeing
My pet keeps scratching its ear. What's causing this problem?
Is your pet scratching their ear often? A certified Petco veterinarian explains common causes like otitis or infection and how to identify the problem.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
My guinea pig has a growing lump on its neck. Can it heal itself?
Guinea pig has a growing, hard neck lump? Worried about vet costs? A certified veterinarian advises on crucial steps for diagnosis and your pet's well-being.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
My pet's ear mite treatment isn't working. What else could it be?
Pet still itching after treatment? A Petco vet clarifies it may not be ear mites. Discover effective solutions like Revolution or consulting an exotic vet.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
My pet has a lump on their neck. What is it and what should I do?
Is your pet's lump a mystery? A licensed vet tech explains common causes like tumors or infections. Discover why a vet visit is crucial for diagnosis and treatment.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
My pet has worsening sores and scratches. Could it be an infection?
Nike's worsening sores and constant scratching worry his owner. A certified Petco veterinarian offers expert guidance on potential causes like bacterial infections and next steps.
Updated on December 04, 2025
image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Book Now

Sponsored