Likewise, the placement of the pillow can help reduce lower back discomfort (Best Memory Foam Mattress Toppers). For example, if you are a side sleeper, try putting a little pillow in between your knees. Top Article. Best Rated King Mattress. This. This will help in reducing your movement through the night and align your spinal column (Best Memory Foam Mattress Topper Consumer Reports). Finding the ideal bed mattress is hard enough without needing to account for lower back discomfort. Our Sleeping Ninjas have worked all the time, sorting through hundreds of reviews, we've brought you the best bed mattress for lower neck and back pain (Best Plush Memory Foam Mattress) (Check Out Here). Whether you are worried about your budget plan or about feeling too hot, we are confident you'll find the ideal mattress for you. Best Memory Foam King Size Mattress. Simply remember, when it concerns back pain, there is no "one size fits all "solution.