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My dog has puss-filled, crusty skin spots. Should I see a vet?

Updated On September 23rd, 2025

Pet's info: Dog | Boston Terrier | Male | neutered | 30 lbs

My dog (10 yo, male, Boston Terrier) has circular puss filled lesions on his belly and chest that drain and get flaky/crusty around the edges. Some lose the hair after draining/crusting. I am wondering if I can wait it out and see if they go away or if it may be something more urgent that needs attention immediately.

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2 Answers

Most Helpful Answer

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Answered By Jenny, DVM

Veterinarian

Published on July 26th, 2017

The circular spots look like epidermal collarettes which are secondary to a bacterial infection on the skin. Sometimes this can affect the hair follicle and make the hair fall out. The pustules with pus are also infected. It is unlikely to go away since it involves several spots already The sooner the treatment starts the better so it stops spreading. Typically they will prescribe antibiotics and possibly a medicated shampoo and something to stop her from scratching if that becomes a problem.

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    Answered By Cara, DVM, cVMA

    Veterinarian

    Published on

    It looks like Buster may have a skin infection, likely either with bacteria or fungus (ringworm). It's not an emergency, but he may need to see your vet in order for them to resolve. They will likely want to sample the lesions to figure out what's causing it and put him on an appropriate oral or topical medication.

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