If you’re waking up with stiffness, numbness, aches and pains, it’s time to reevaluate your mattress and foundation (boxspring). How long a mattress will last depends on several factors, such as amount of use and original quality, but generally a mattress set that has been in use 5-7 years is no longer providing you with the best comfort and support. People’s bodies change over time, and the need for good comfort and support only increases with age. That’s why it’s a good idea to compare the bed you are sleeping on now to newer models every few years.