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My puppy has a swollen, black and blue mouth. What should I do?

Updated on September 23rd, 2025

Pet's info: Dog | Dachshund (Miniature Wire Haired) | Female | unspayed | 8 months and 23 days old | 11 lbs

my 9 month old puppy (long-haired mini dachshund) is swollen on one side of her mouth. The inside of the swelling in her mouth is discolored. It is black &blue. What should I do?

1 Answer

Most Helpful Answer

Tomasz Wnuk

Answered By Tomasz Wnuk

Veterinarian

Published on July 9th, 2020

Hello and thank you for contacting Petco Pet Education Center, formerly Petcoach. It is either an allergic reaction or a growing abscess. If the swelling is hot and painful to touch, it is probably an abscess. In this case, you should take Angie to your local vets for an appointment today. If the swelling is not bothering your puppy, is soft and is not warm to touch, it could be an allergic reaction. In that case, you can monitor Angie at home for a few hours and apply a cold compress on the face every 1-2 hrs. If it is an allergy, the swelling should go down in the next 5-6 hrs.
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