Hi,
Here is what happened to me. I was diagnosed with Graves disease in 1986 and vitiligo about the same time. Had radioactive iodine treatment and then replacement of the thyroid hormone. Then, in 1993 or so I had my regular thyroid level checkup. It said I was overreplaced and they lowered my dose to one lower than I had ever taken. Not long after that I began having strange symptoms including being very tired, cold, skin was strange, many, many aches and pains and there was also swelling around my eyes. I had very bad stiffening of my muscles.
I made an appointment with a rheumatologist thinking that I was getting rheumatoid arthritis like my mom. Naturally, he checked an ANA and, believe it or not, it was positive. He then checked all the more specific tests and they were all negative.
Finally, after thinking I had lupus, I went back to the endocrinologist and they checked my thyroid level and it was the lowest it had ever been after they changed the dose, way below normal. They increased the dose again and my symptoms went away. They were all due to the abnormally low thyroid. No one had warned me about symtpoms due to low thyroid. They are terrible, truly terrible. It is now 16 years later and I still have a positive ANA but no lupus and no symptoms of lupus. We finally quit checking my ANA.
Georgia.