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Updated on September 23rd, 2025
Pet's info: Dog | Chihuahua | Male | neutered | 9 months and 1 day old | 12 lbs
My dog has a small red blister on his penis shaft by where his testicals use to be.
4 Answers

Answered By Laura Johnson VMD
Veterinarian
Published on July 16th, 2017
Answered By Ricardo Fernandez, DVM
Veterinarian, Veterinary Oncology Resident
Published on November 21st, 2018
Thanks for using Petco Pet Education Center, formerly Petcoach! It is hard to know what this may be without an evaluation. I suspect that this is likely unrelated to the neuter per se and this is likely due to an itch possibly secondary to allergies for example or perhaps there may be an infection going on. I recommend that you have him evaluated by a veterinarian for further assessment and treatment. They would be able to evaluate him and determine what may be going on so that he can be treated accordingly. Good luck!
1Pet Parents found this answer helpful
Answered By Ricardo Fernandez, DVM
Veterinarian, Veterinary Oncology Resident
Published on December 7th, 2017
Thanks for using Petco Pet Education Center, formerly Petcoach! This could be a benign or malignant growth. This is often differentiated by a test called a fine needle aspirate (FNA) which is a pain free, inexpensive and easy procedure which in most cases will help reach a diagnosis. Sometimes a biopsy is needed for a definitive diagnosis. I recommend that you have him evaluated by your veterinarian for further assessment and treatment. I am really hoping for something benign. Good luck and have a good day!
1Pet Parents found this answer helpful
Answered By Ricardo Fernandez, DVM
Veterinarian, Veterinary Oncology Resident
Published on November 8th, 2018
Thanks for using Petco Pet Education Center, formerly Petcoach! This could be a benign or malignant growth. There is no way of knowing for sure without an examination though this represents a reason to seek veterinary care. This is usually determined with an examination and a fine needle aspirate (FNA) or a biopsy. Treatment depends on the findings up to that point. I recommend you have Avery evaluated by a veterinarian for further assessment and treatment. Good luck and have a good night!
5Pet Parents found this answer helpful