My six year old westie has 2 lump things on his head almost like human warts. They haven't caused him any discomfort until last night when he was rubbing himself against the furniture and caught it and it bled a little. What are these? Has anyone elses dog had them?

Hi it could just be as you said warts but I would get a vet to have alook at them especially if they are irritating him. :) Gillian