An unmade bed has indentations in the sheets or mattress and multiple pillows - Komsan Loonprom/Shutterstock A sagging mattress can cause you to feel pretty sad when you get out of the sack. The lack ...

Despite what manufacturers want you to think, buying an expensive, high-end mattress isn’t going to magically solve all of your sleep problems. Sleeping on a mattress that sags or dips in the middle ...