Try sleeping/resting/sitting on sheepskin bed pads.
There are 2 things that bed sores need to develop; moisture and pressure.
With authentic sheepskin the fibres are so strong, (stronger than steel)they support your body by distributing weight evenly, as well as these spring type fibres move with your body, always supporting it.
The fibres wick away any moisture immediately so it's never next to your skin. The bed bad can retain 30-40% of it's weight in moisture and releases it into the air.
Due to the natural lanolin in Sheepskin bed pads, they are safe for even the most sensitive skin as well as lanolin helps to heal any bed sores already existing.
They are versatile, use them anywhere and are machine washable.
Only use authentic sheepskin, synthetic or imitations will only make the problem worse.
I have an ecommerce store that offers only authentic sheepskin products, with a complete line of medical grade sheepskin.
Check out http://www.holysheepskin.com,
it's honestly good for you!