I have had similar issues with painting the mesentary area.
I painted 5 vertical drops of 5% Lugols on the mesentary.
Sinuses cleared as others have mentioned, and a warming/tingling feeling in the feet and legs. Also an overall sense of calm and clarity.
But where i painted feels like it is mildly burning, and it is very tender. It is slightly painful to the touch, but not too bad. The next day the tenderness is very mild if not gone, but a pink circle remains where the Iodine was. It almost looks like a sunburn.
I did this 1 week ago, and the circle was visible for several days. I tried it again last night with the same results.