My girlfriend’s Serta Perfect firm pillow top mattress is 8 years old, she’s back and stomach sleeper, she told me “In the past 2 weeks, I keep waking up with back pain”, she is thinking about she’ll get new mattress?
The most common cause of mattress related lower back pain is a lack of sufficient support to maintain your spinal alignment. This is often caused when the mattress either becomes too soft over time or has too thick of a comfort layer which allows you to hammock. This is particularly troublesome when stomach sleeping since your spine will be unnaturally arched so your muscles are strained and you wake up sore. Generally a more supportive mattress is needed for stomach sleeping which is the hardest on your back.