Can We Talk About Iodine?

As my rashes are slowly going away ( diet and dapsone ) one of the reasons I am pretty sure I have DH is that itching increases with salty foods.
I understand that gluten will cause antibody production and the longer I stay off gluten, then less reactive ..(ie..less antinbodiy prduction) will result from accidental ingestion of gluten.
Does iodine cause a "relapse" in the healing process... Or is it only temporary increase in itchiness?