Limited mobility coupled with impaired sensation can lead to pressure sores or ulcers, which can be a devastating complication. If not treated, pressure sores can ulcerate, leading to a medical emergency and prolonged hospital stay. Pressure ulcers, also called bedsores, range in severity from mild (minor skin reddening) to severe (deep craters that can infect all the way to muscle and bone). Unrelieved pressure on the skin squeezes tiny blood vessels, which supply the skin with nutrients and oxygen. When skin is starved of blood for too long, tissue dies and a pressure ulcer forms.