Petco Text Logo
Petco Pet Logo

My dog has a sore from a popped lump that won't heal. What's wrong?

Updated On September 23rd, 2025

Pet's info: Dog | Miniature Schnauzer | Male | unneutered | 7 years and 6 months old | 25 lbs

Hi! My dog seems to have a sore that won’t heal. Before it was a sore it used to be a lump that he used to have on his side, and then it eventually popped. It has been a few months and it still won’t heal, and instead just crusts over. He has a few small bumps next to the sore as well. I also noticed he has about one other lump other his skin on his back. Is this something I should be worried about? He is a 7 year old Mini Schnauzer, about 25 pounds.

1 Answer

Most Helpful Answer

Image profile

Answered By Andrea M. Brodie, DVM

Veterinarian

Published on January 1st, 2019

This may be an abscesses, cysts or tumors. You should have them examined by your veterinarian. An abscess can usually be treated with antibiotics and/or be lanced, and a cyst can be evacuated. To identify a tumor, your vet may want to do a fine needle aspirate (he takes some material from the bump with a needle and then looks at it under the microscope) to determine whether the mass is concerning.

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

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

Sponsored