How is rotating patients effective against bedsores?

Cause Pressure Sore. Pressure causes a bed sore. One unknown is how long does it take a pressure ulcer to develop. There are many risk factors including diabetes mellitus, low blood pressure, moisture from incontinence or perspiration, fungal infection, use of medical devices, etc. We simply do not know for an individual patient whether rotating them every five minutes or every two hours will prevent pressure injury.
Blood flow. Bedsores occur due to pressure and lack of bloodflow. By turning you take pressure off the area and allow an increase bloodflow to the tissues.
Takes the pressure o. By rotating patients you take the pressure off a particular spot.