I just had over 200 of RAI in March and my cheeks swelled up like a chipmunk but was not painful. This lasted two days. Now 6 months later, they are swelling up again whenever I salivate. At first, it was painful, but now soreness has become tenderness. This is supposedly normal. Otherwise, there were no major symptoms, but the whole ordeal has been very tiresome. After surgery, and increased levoxyl, and radiation treaments, it seems odd that I felt okay before all this began, and I had cancer. You can't see it or feel it, but it is there.