A decubitus ulcer, also known as a pressure sore or bed sore, is a skin injury that occurs when pressure is applied to the same spot for an extended period of time. Synonyms for decubitus ulcer include pressure ulcer, pressure sore, decubitus injury, and bed sore. Decubitus ulcers can be painful and require careful treatment to prevent infection and promote healing. They are often associated with patients who are bedridden or spend long periods of time in a wheelchair. To prevent the formation of decubitus ulcers, patients should be repositioned frequently and encouraged to engage in gentle exercise and movement. Treatment options may include wound dressings, medication, and surgery.