What Causes A Wart-like Growth On A Dogs Skin What Causes Bleeding, Roughness And A Wart Like Growth Near The Nail On My Right Middle Finger. It Is Painful?

What causes bleeding, roughness and a wart like growth near the nail on my right middle finger. It is painful? - what causes a wart-like growth on a dogs skin

I was present for several years. I tried all kinds of cream. I have tried to burn with the solvent Verrucci. Nothing works. Who knows what the causes and what I could do for him. I play guitar and I can hardly play now. Bleeding, if it is touched. It often seems to be as an orange-red crystals separated.