If you do not awaken with pain or soreness, there may be no need to change your sleep position. However, the vast majority of people do sleep on their side which can lead to significant shoulder and neck pain. If you are a side sleeper, make sure that you use a pillow that's thick enough to support your head and take some of the pressure off your shoulders as well as your neck. In addition, sleeping on your right side can potentially increase problems of heartburn and acid reflux. Those who sleep on their stomach should use a flatter pillow to avoid excessive pressure on the neck and upper back. Sleeping on your back is the best position anatomically speaking, but less than 10% of people actually do so. Sleeping on your back helps to reduce aches, pains and heartburn because it allows the body to rest in a completely neutral position. The downside to sleeping on the back is that it can increase the amount of snoring. Regardless of which position you ultimately sleep in, comfort is the key and if you awaken refreshed and without significant aches or pains, you're probably in the perfect position!