Do you wake up with sore, achy knees? It could be due to the way you curl up at night. When we sleep on our side, both knees can rub against each other, or one knee will fall slightly forward, says Rick B. Delamarter, MD, co-medical director of the Cedars-Sinai Spine Center in Los Angeles
. This puts the pelvis at an awkward angle, exacerbating existing knee pain. Delamarter suggests placing a small pillow between your legs. This will cushion the knees, level the pelvis, fix spinal alignment and even alleviate lower back pain.