Please tell me you're not reading the stop the thyroid madness website. That site is total bs. I “joined” (and then quickly unjoined) a hyperthyroidism/hypothyroidism group on another site that I use to log my calories and exercise, and those people will swear up and down by the stop the madness site. They will also tell you that people who are hypo should take diet pills, people who are overweight should take levothyroxine, and that anyone with Graves should never eat between 6 p.m. and 10 a.m. The point of that site is to sell their books, not to provide proven medical advice for people with thyroid disease. It really ticks me off, to be completely honest, especially since they recommend high-salt diets or taking products from a health food store instead of levothyroxine.
People who receive actual radiation in the form of radiotherapy/radiation therapy may have mild burning at the radiation site. Again, you aren't being treated for cancer and you aren't receiving radiation therapy.
Just goes to show that you can't trust everything you read in the internet. I am truly not trying to convince you to get RAI, but I am trying to convince you that your doctor was not being careless or malicious by not telling you that you might burn your face off or stop tasting food if you take the RAI.