If any part of our body is subjected to constant pressure then there is a high probability of reduced blood flow to the tissues. Blood delivers oxygen and nutrients to the tissue and is important for their survival. A complete cut-off or restricted flow of blood can damage and kill the nearby tissue over time. Bed sores caused due to pressure can damage the skin. For Bed bound patients open sores develop on the skin directly over the bone. These areas include the spine, tailbone, shoulder blades, hips, heels and elbows.