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If you're hesitant about investing in a new mattress, there's an easy place to start: a knee pillow. It was one of the first recommendations that Sean Mackey, doctor of neurology, chief of the Division of Stanford Pain Medicine, and past president of the American Academy of Pain Medicine (AAPM), gave me when I asked him about how to reduce pain while you sleep. He explained that one of the sources of pain can be a lack of rachis alignment, or the alignment of your spine. “Generally, you should either be sleeping on your back or putting a pillow or support underneath your knees for spinal alignment,” says Mackey.
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