I left my doctors after noticing an existing mole had become slightly raised, red and itchy. My doctor said it was infected with just one glance and I thought that was that. But also he said to come back In a week and he couldn't tell if it was cancerous or not. I'm confused to how it might be both and surely waiting a week won't make any difference to its appearance if it is cancerous so an extra week will just delay possible treatment if it is melanoma?