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My dog has a hard marble-sized bump. Could it be a bug bite?

Updated On September 23rd, 2025

Pet's info: Dog | Pit Bull Terrier | Male | neutered | 5 years and 11 months old | 85 lbs

Noticed a marble sized bump while petting him this morning. It’s kind of hard. Mosquitos are terrible here so I’m hoping it’s a bug bite or something. He doesn’t and hasn’t been acting sluggish or anything. I know you’ll just tell me to see our Vet, but I’d like an opinion on it before then.

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1 Answer

Most Helpful Answer

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Answered By Dr. Strydom, DVM

Veterinarian

Published on July 26th, 2023

Hello, thank you for using PetCoach. It is very difficult to say what a lump could be without feeling it. My best guess is that this is a sebaceous cyst which is benign. So, yes, you should take him to your vet for an exam. It is not an emergency; just try to get him an appointment in the next week or so. ( https://www.kingsdale.com/sebaceous-cysts-in-dogs ) Hope this helps. Best wishes.

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