I was diagnosed with Hashimoto s Thyroiditis 7 years ago and have been taking Synthroid ever since. As far as the fatigue and most of the symptoms are concerned, I feel all right, but I ve lately begun to have terrible abdominal bloating, as well as water retention in my joints. I cut out gluten as saw no change--in fact, I systematically went through a number of possible causes, but nothing changed. I m a young 62, active, and have never weighed more than 115 lbs. Since 2006, however, I have gained 25 lbs. Is there some way to fight this bloating?