ANA related to hyperthyroidism?

[JannaJenkersJenk]

Dear (Endocrinology) Doctor or healthcare professional-  My TSH is 0.027, my Free T4 is 2.04, and my Free T3 is 5.3.   I understand that this is hyperthyroidism.  My doctor explained to me that this is due to a goiter on my thyroid and that I will need a nuclear thyroid scan that will involve some radioactive iodine to see if it will show up as a "hot" spot on the scan.  Before when I had this scan and was given this medicine I broke out in hives.  Is this common?   According to the doctor, I would need to take some benadryl before this.  I have lots of trouble with a fast heartrate, lots of anxiety (it feels as if I'm being rev'ved up all the time), and not being able to sleep well.  Is this related to my hyperthyroidism?  Lastly my ANA came back positive (1:40) and I was wondering if this was related to my hyperthyroidism.  
Question recap:
1.  Do some people get hives from radioactive iodine?  Is this a side effect or an allergy?  
2.  Are the symptoms mentioned above related to hyperthyroidism?
3.  Could my positive ANA be caused by my hyperthyroidism?
Thank you very much for your time.  I anxiously (not due to hyperthyroidism LOL) await your response.

[Red_Star]

1. An allergic reaction to radioactive iodine treatment includes shortness of breat, chills/rigors, fever, rash/hives.

2. Hyperthyroidism symptoms include elevated heart rate, anxiety and not sleeping well.

3.  Samples under 1:40 are considered negative for ANA antibodies. Depending on what medical website you read, 1:40 can be a negative result or a mild positive result. A positive ANA test result may suggest an autoimmune disease but further testing is required.  Autoimmune thyroid disease (either Graves' disease or Hashimoto's thyroiditis) may show up with a positive or negative ANA titer.  One study on Hashimoto's thyroiditis found 47% were ANA positive. Of them, 60% showed a titer of 1:40.  Another article states the ANA sensitivity of Hashimoto's thyroiditis is 46% and Graves' disease is 50%.

[Barb135]

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