Are you able to self-examine? I've had two SCCs and eight to ten BCCs since 1992 when I had a melanoma removed from my back. I didn't spend a lot of time in the sun but I always burned and almost never had tan. I got multiple burns the summer I turned 17 and it almost looked like a tan with a lot of white speckles. I have two nieces who had melanomas (one is still being treated). Their dad, my brother, always tanned and never had any skin cancers. More recently, I seem to have a couple BCCs every time I go to the Derm. As I have multiple Seborrheic Keratoses, it's hard to self-examine as everything looks bad. Try to go to a Derm at a university hospital/medical center and ask them what might be going on. 19 in 18 months is way too many for anyone.