[old and tired]

In fact Iodine allergies are extremely, extremely rare, all but impossible. Most times people might think they have iodine allergies it is an allergy to certain fish proteins.

Most times a reaction to iodine is your body waking up and finally getting rid of stuff that shouldn't have been there in the first place. This is especially true if you eat a lot of processed food or swim in chlorinated water.

[djf]

Xactly. A detox reaction, like from MSM.