Bedsores -also called pressure ulcers and decubitus ulcers - are injuries to the skin and underlying tissue as a result of prolonged pressure on the skin. Bedsores often develop on skin that covers bony areas of the body such as the heels, ankles, hips, and tailbone. People at risk for bedsores have medical conditions that limit their ability to move or cause them to spend most of their time moving. in a bed or chair. Bedsores can develop over hours or days.  Most wounds heal with treatment, but some never fully heal. You can take steps to help prevent and heal wounds. Bedsores fall into one of several stages depending on their depth, severity, and other characteristics.  The degree of skin and tissue damage ranges from red, unbroken skin to deep bruising involving muscle and bone.