Most high-quality mattresses last 7 to 10 years . If yours is a "tween," it’s likely lost its support.
Mattresses collect dust mites and allergens over time. If you’re waking up stuffy or itchy, it might be time for a fresh start. when is it time to buy a new mattress
Before you toss it, try rotating it 180 degrees. If the support doesn't improve within a week, start browsing the sales. Most high-quality mattresses last 7 to 10 years