"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." First, a crash course on what fingernail ridges even are: Vertical nail ridges (lines that run from your ...

Add Yahoo as a preferred source to see more of our stories on Google. You probably don’t spend much time thinking about your fingernails (unless you’re painting them!). But your nails can provide key ...

Fingernails seem like a pretty uneventful body part. They grow. You cut them. Maybe paint them. And that’s about it. But in reality, your nails can give you a glimpse into your overall health. If ...