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My dog has a strange spot under her arm after grooming. What is it?

Updated On September 23rd, 2025

Pet's info: Dog | Maltese | Female | unspayed | 8 months and 10 days old | 6.5 lbs

Hi! My 9 month maltese has an unusual spot under her armpit. I can't make sense of what it is.. it may be a burn, a cut, a bug bite or something else.. I really don't know what to do about it please help! P.S I thought it would be good to mention that she just got a haircut yesterday.

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1 Answer

Most Helpful Answer

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Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on May 31st, 2017

Poor Masha! This looks like a relatively minor skin wound, from what I can tell in the photos. It's possible that her skin may have been accidentally nicked or caught in the clippers during her haircut yesterday - it's very easy for this to happen in small dogs with delicate skin. She also could have scraped or poked herself on something, or this could be a local inflammatory reaction to some type of insect bite. If this is the only spot like this you can see and she is acting normal otherwise, you could opt to monitor it for the next few days to see if it heals up on its own. You could also use a topical antibiotic spray such as Vetericyn or Nutri-Vet on the area as well, if you wish. If it does not seem to be healing within 5-7 days, or if the area around the wound becomes red and swollen, then it would be best to have her seen by a vet - in that case, she would likely need prescription antibiotics and anti-inflammatory medication to treat the problem.

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