Petco Text Logo
Petco Pet Logo

My dog has a sudden, bloody sore on his rear. What should I do?

Updated On September 23rd, 2025

Pet's info: Dog | Dachshund | Male | 5 years old | 10 lbs

I woke up to my dog crying last night, he had a sore on his rear end and there was blood and pus all over. This was not there a few hours before; it was like a horror movie. Now he has a sore, somewhat deep and keeps licking it. I cleaned it but might need antibiotics? Could it be an insect bite?

This question includes photos that may contain sensitive content. Click to view.

View more to consider that the photos may include sensitive content.

1 Answer

Most Helpful Answer

Image profile

Answered By Stacey Anstaett, DVM

Veterinarian

Published on June 9th, 2018

Based on the location (it appears to be just to the side and just below the anus), an anal gland abscess may have ruptured. I doubt it’s an insect bite, but I can’t rule that out completely. It could also be another type of mass such as a tumor or a foreign body (such as a grass seed) that’s burrowed into the skin and caused an abscess. Regardless, your instincts are correct; this likely needs to be treated with antibiotics. Put an E -collar (cone of shame) on him and make an appointment with your vet ASAP. Hope that’s helpful! Thanks for using Petco Pet Education Center, formerly Petcoach!

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