Pressure damage occurs when skin is compressed between two hard surfaces - bone and hard bed/surface. Pressure must be relieved - either moving from side to side, alternating with your bottom. Other parts of the body are equally at risk - elbows, heels, shoulder blades, spinal bones, back of the skull, and without frequent position change all of these areas will be at risk of damage.
An air/pressure relieving mattress can organised from the community team, they are excellent, and the channels all alternate filling and emptying with air, and reducing the pressure on that part of the body, but body position still needs to be changed.
Diet, nutrition and hydration are important. Barrier creams are helpful, but will not prevent any skin damage. Please contact your GP for help and appropriate referrals.