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Why is my dog's testicle swollen with green discharge and licking?

Updated On September 23rd, 2025

Pet's info: Dog | Labrador Retriever | Male | unneutered | 9 years and 10 months old | 65 lbs

My 9yo labrador has one significantly enlarged testicle & is constantly & relentlessly licking his genital area. I've noticed a green-yellow discharge leaking from his penis, more frequently than what seems to be normal. I took him to the local vet a few weeks ago for hind leg issues where they pointed out the enlarged testicle to me but it wasn't mentioned again. Can this be serious? Should I take him to a different vet? Thank you so much. I wanted to ask you before stressing him with the vet.

1 Answer

Most Helpful Answer

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Answered By Makenzie Kurth, DVM

Veterinarian

Published on May 29th, 2019

Thanks for using Petco Pet Education Center, formerly Petcoach. Yes I would definitely bring this up again. A few things come to mind - some more serious than others. Testicular torsion is excruciatingly painful and requires surgery. Testicular cancer, and scrotal hernia are also on my list of things to rule out. The green/yellow discharge can actually be normal in in-tact male dogs but could also signal an infection or urinary problem. All in all, it's worth talking to your vet about it again. Best wishes to you and Buddy!

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