Stomach sleeping is often associated with neck and back pain, giving it a reputation for being a “bad” sleeping position. While it can easily cause aches and pains, sleeping on your stomach isn’t necessarily bad for you. Many mattresses can cause the chest and hips to sink too far down, which can lead to pain. Similarly, some pillows may provide too much loft for stomach sleepers, leading to neck soreness. For the best alignment while sleeping on your stomach, we recommend a firm mattress for stomach sleepers and a supportive pillow that doesn’t have much loft to it.