ANSWER: Be honest – do you even know the brand of mattress you’re sleeping on?!
Studies say that you should replace your mattress once every 5-10 years, 7-8 being prime time to begin thinking about replacements. Depending on the quality of your mattress, whether or not you share it, if pets sleep on it, and how often you rotate it, a mattresses' lifespan depends on a variety of factors. Rotating mattresses can increase their lifespan, as well as switching sides and changing positions. But when it becomes uncomfortable to lay on, it may be time to bite the bullet.
Is your mattress older than 5 years?