As you can see above, another expert has agreed with my post.
There are medical conditions such as tumors or infections which can lead to erections in dogs, but neutered dogs can get erections that are normal, no underlying cause, and not something we typically treat.
_____________________________________________________________________Please click "ACCEPT" if the information I have provided has been of help so I receive credit for my work. Bonuses are always welcome and appreciated. Thank you.The above is given for information only. Although I am a licensed veterinarian, I cannot legally prescribe medicines or diagnose your pet's condition without performing a physical exam. If you have concerns about your pet I would highly advise contacting your regular veterinarian.