Decubitus ulcer

Also known as: Pressure sores, Bed sores
A pressure sore (bed sore) is an injury to the skin and/or the tissues under the skin. Constant pressure on an area of skin reduces blood supply to the area. Over time, it can cause the skin to break down and form an open sore (ulcer). Pressure sores are more likely to form if you or a person you are caring for is in the hospital or is confined to a chair or bed.