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My dog has a bloody lump after rattlesnake vaccine. What should I do?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | neutered | 43 lbs

About 2 weeks ago my dog received his rattlesnake vaccine. About a week later he developed a lump about the size of a half dollar. Tonight it has discharge and blood coming from it. Why did this happen and how should I care for it?

1 Answer

Most Helpful Answer

Sarah Derksen, DVM

Answered By Sarah Derksen, DVM

Veterinarian

Published on August 6th, 2017

Hi. It ,osteoporosis likely is an inflammatory response, and now may be possibly infected. I recommend placing ice on it for 5-7 min a few times over the evening. Call your veterinarian in the morning. I recommend asking your veterinarian to premedicate with benadryl before the next vaccine
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