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Why does my dog have a bloody-looking spot under her armpit?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Female | spayed | 50 lbs

My dog randomly developed a bloody looking wound under her armpit. She was fine all day. The blood isn’t scabbed or actively bleeding. Almost like it’s under the skin. What could this be?

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1 Answer

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Answered By Jessica Desrosiers

Veterinary Technician

Published on February 14th, 2020

Ouch! That's quite the sore spot. It's possible it was snagged on something, or Shylah was licking/scratching at the spot. Since it's a rather large wound, it'd be a good idea to have your vet take a look so they can clean and clip around it and provide you with any antibiotics or pain meds as needed. Until then, keeping her from licking at it with an Elizabethan (cone) collar, and keeping the area clean and dry may help reduce irritation.

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