By Freya Hodgson Around 16 percent of Brits are stomach sleepers, but one doctor has warned that the prone position could pose various health consequences. Resting on your front may feel comfortable at the time, but turning your head to one side can lead to muscle tightness and inflammation. Sleeping on your stomach flattens the natural curve of your spine, which can cause lower back pain, explained Dr. Tony Nalda. The expert, from the Scoliosis Reduction Center, added: “If you already have neck and back problems, sleeping in this position is almost guaranteed to make them worse.” The popular …