Hello Ada,
I am allergic to duoderm and wonder if perhaps it is not the best dressing for you at this point.
It is actually an ulcer dressing---do you have much broken skin there? If there is no break in the skin then it may well be damaging to have the movement restricted by the duoderm.
The thin skin I think is often not so much as a direct result of RSD but due to the horrendous types of medications we take to help our RSD. Many of them have skin thinning properties, especially steroids.
Take care and good luck with your sister's visit.
Cheers Tayla