I was using iodine for several days painting it on my neck for a sore throat and because I know this is something I am deficient in. After a few days the front of my neck began to swell a little and burn when I put the iodine on so I stopped putting it on my neck and put a small patch on my leg instead. Within a few minutes my throat began to burn in the area of my thyroid where it was swollen. Does anyone have any ideas? Is it from too much iodine? Or just a reaction from being deficient too long? Any info would be appreciated.