Man with the Iron mask
In my story I have a character who is of high nobility who is forced to wear an iron mask covering his whole head to hide (unspecified) birth deformities. Other than eyeholes he is entirely covered.
What I know
A mostly sealed system like the inside of the mask would encourage mold growth and increase chances of infection from even minor wounds.
It is a helmet sculpted in the image of the wearer's head. It is allowed to be removed privately for eating and other activities and is cleaned at periodic intervals. There are holes around the mouth to allow for breathing.
The palace guard does the work of keeping the mask on.
The palace is a low light environment to keep from affecting the master's sensitive eyes.
His nation is temperate in climate like Germany or France.
The birth defects he suffers from are a fictional variant of albinism with similar symptoms and possibly others.
He is clean shaven.
The mask is metallic to raise the wearer's spirits with the thoughts of knights in their armor. the mask could be cleaned every few weeks or so.
Assuming the mask is not changed often and that this character dwells mostly inside a palace in a low light environment, what effect would this have on his face?