For a mattress to stay supportive and even, you'll need to rotate it — and possibly flip it, too. But how often should you rotate or flip your mattress, and what happens if you don't? We'll be sharing ...

Mattresses are supposed to last at least seven years, but they can become uncomfortable to sleep on much sooner. If you never flip or rotate your mattress, the springs or foam wear out under pressure.

Flipping your mattress every six months is one of those tasks you only really learn about when you become an adult or invest in a proper mattress for the first time. Don’t get us wrong, staying on top ...