On April 17, I saw my endo for a pre-op exam and just because I happened to be there and have been losing weight since September, we decided to test my TSH. The TSH was low, indicating hyperthyroidism. The same blood sample was used to test T3 and T4, and since those were okay (one totally normal, one borderline), I went ahead and had surgery and my endo said to come see him after I was recovered enough. So on May 8, I went back to see him. My pulse was 88, weight 97 (was 119 in August), bp 104/56, tremors in my hands and tongue (I didn't know you get a tremor in your tongue), normal reflexes, and no goiter. He drew my blood again to recheck the TSH and to check for antibodies, and gave me a form to get an iodine uptake scan. I asked him what're the odds that this'll go away by itself and I'm fine. He said very small, unless I'm taking an iodine supplement or something, which I'm not. He said at this point, he thinks I probably have one of three things: Graves' Disease (an autoimmune disorder in which your thyroid swells up and makes too much thyroid hormone), Hashitoxicosis (which is where you start hyperthyroid and then develop hypothyroidism in Hashimoto's Disease, also autoimmune), or Plummer's Disease (which is basically a benign thyroid tumor, and probably autoimmune- at least, antibodies for Hashi's and Graves' are common with Plummer's). So right now, it looks like I have a second autoimmune disease, and it's probably Graves' disease, although it might not be. Although I am worried about the thyroid itself, and also kind of wornout from surgery and from the thyroid symptoms and stuff, I'm also wondering about my risks of getting more autoimmune diseases. After all, I was diagnosed with type 1 diabetes less than three years ago. I don't have a family history of diabetes or thyroid disease of any type at all, not that I or my parents know of. If a 20 year old man has type 1 diabetes and Graves' Disease developed at ages 16/17 and 19/20, what are his odds of developing another autoimmune disorder by age 30? Also, from what I can see on these forums, lots of kids have diabetes and Hashimoto's. Did any of your kids have hashitoxicosis, Graves' or Plummers? How does it affect diabetes before you're treated, and how does it affect diabetes while you're being treated?