Painful Daily Erections in a Neutered Maltese
by A reader
Repeated painful erections are rare in dogs. Possible causes include a problem with the nerves of the spine or pelvis, which can trigger erections and pain, inflammation or a growth affecting the penis or prostate, a blood flow problem in the penis, and less often, conditions that make blood thicker.
Ask your vet about a referral to a veterinary neurologist, along with an MRI of the lower spine, and to a urology or reproductive specialist for an ultrasound of the penis and prostate. Bringing videos of an episode helps specialists a lot.
In the meantime, if the penis stays out, keep it moist with a water-based lubricant and contact your vet if it stays out for more than about 30 minutes.
See dog penis problems.
This is general information, not a diagnosis. Please follow your own vet's advice.