Although queen-sized mattresses are designed to last, they have a limited lifespan, typically offering between seven and ten years of life. However, beyond age, there are some other indicators to look out for:Sagging & Unevenness: If your mattress is beginning to sag in the middle or your sleeping surface has developed noticeable lumps and bumps, it’s time to replace it. Aches & Pains: Waking up with aches, pains, or stiffness can indicate a decline in your mattress’s support.Poor Sleep Quality: Having trouble getting to sleep, tossing and turning, or waking up frequently throughout the night can often be pinned down to a worn-out.Allergies: If you have developed allergies or sensitivities to your mattress, it’s time for a replacement.