Since you have not given the diagnosis or the dose of radiation
and the regions which received irradiation, i cannot answer your question properly.
Assuming that the the right was in the field of radiation (PURE ASSUMPTION) the skin over that region could appear black and the area of skin behind the ear can have ulcerations. If that is so it will subside by itself with daily dressings and antibiotics. But your description " looks like it is dead, and not getting any circulation " is not common at all. The other problem that I anticipate is if this is persisting / or if it is infected (like i understand from your description) then your chemo might get delayed
Hope you are satisfied with my answer