Columns share an author’s personal perspective. I’ve been bitten by a vampire. Okay, not really. But it certainly looks that way. When I woke up one morning, I had two red spots on my neck, about ...

Most people have, at some point, discovered mysterious bites that leave red, itchy welts on their skin. The most common culprits of these irritations are no-see-ums and bed bugs—but what’s the ...