From dry skin to allergies, here’s how to figure out what might be causing the itch.

I spent every night tearing my skin apart, but specialists refused to listen and insisted it was dry skin or an allergic reaction.

You’re finally comfortable in bed, drifting peacefully toward sleep when suddenly—itch. You scratch. Another itch pops up. Before you know it, you’re wide awake and scratching like crazy, wondering if ...