I used real Manuka honey bought from a farm in New Zealand over 10 years ago for someone with cancer. https://manukahoney.co.nz/
It helped the bed sores. I know there is medical grade honey that Doctors can do a script for but don’t know if it is manuka. HOWEVER...might be an issue for a diabetic
Also..there are various rotating beds that are suppose to help with bed sores.