Old or Low-Quality Mattress and Pillows
One thing that totally ruins quality sleep is an uncomfortable mattress. If you’re not sleeping as well as you used to and it’s been some time since you got a new mattress, it might be time to invest.
Harvard Medical School’s Division of Sleep Medicine recommends that you replace your mattress when it wears it, about every ten years. Your pillow should also suit your sleeping style, as people who prefer different positions need different types of support.
