White Inside Mouth My Dog Has White Warts Inside Is Mouth Well Its Mainly Around The Edge Of His Lips On The Sides And Nose?

My Dog has white warts inside is mouth well its mainly around the edge of his lips on the sides and nose? - white inside mouth

What is it? are white, like warts or herpes, lol but it looks serious, I wonder if anyone knows what is and what can I do to treat it .. Id appreaciate it.
Thanks