#2: Medical Mystery
Here’s a story that combines terrors, both supernatural and medical in nature. Recurring nightmares about a black parasite are pretty terrifying, but discovering you have a tumor is also pretty bad, because that is a very real and present threat to your well-being.
And as terrifying as that dream would have been, in a weird way, maybe it’s what helped him. Maybe it drew his attention to that spot on his body and made him more aware when the lump appeared, which led to him getting the help that he needed to get it treated. So, thanks, creepy nightmare, I guess?