Pressure ulcers (also known as bed sores, pressure sores and decubitus ulcers) are localised areas of tissue damage caused by excess pressure, shearing or friction forces. Pressure ulcers mainly occur in people who have limited mobility, nerve damage or both. Pressure, from lying or sitting on a particular part of the body, results in oxygen deprivation to the affected area. Repositioning involves moving the individual into a different position in order to remove or redistribute pressure from a part of the body. If a patient with an existing pressure ulcer continues to lie or bear weight on the affected area, the tissues become depleted of blood flow and there is no oxygen or nutrient supply to the wound, and no removal of waste products from the wound, all of which are necessary for healing. Patients who cannot reposition themselves require assistance. International best practice advocates the use of repositioning as an integral component of a pressure ulcer management strategy. The authors found no studies that were eligible for inclusion in the review. Therefore, we do not know whether repositioning patients makes any difference to the healing rates of pressure ulcers.