Even the highest quality mattress will not last indefinitely. Experts recommend replacing a mattress at least every 7 to 10 years, to combat wear and tear and prevent an unhygienic build up of contaminants. As your mattress ages, the materials used start to deteriorate, reducing the level of support provided and increasing pressure on your spine and joints. Many sleepers initially find themselves switching sleeping positions more frequently during the night, or waking with a headache or backache caused by sleeping out of alignment. After years of comfortable sleep, it may not be immediately obvious to check your mattress for indications of wear and tear. However, if you start to experience problems sleeping, or wake up feeling more tired than usual, an ageing mattress could be the underlying cause.