My 19 year old was diagnosed with consistent hyperplastic nodules in his thyroid about 3 years ago, and has to have ultrasounds every year. He had a needle biopsy 3 years ago. He has just recently been diagnosed as bipolar, but I'm sure the GP hasn't done thyroid tests on him. I've been reading about the possible link between thyroid disease and bipolar. He's had violent mood swings, inability to concentrate, gets extremely overwhelmed with the smallest demand/task, sleeps 18 hours, up for 3 and then sleeps another 8 hours. Or up all night. I suspect he's rapid-cycling. Anyway..... does anyone know of cases with his thyroid condition and a link to bipolar? I'm going to go to our GP (luckily we have the same one) and insist on thyroid tests before we go too much further with bipolar meds. So far not on any mood stabilizer---just Tevo-Divalproex, but I don't know much about it yet. He's being weaned off Pristiq for the misdianosis of depression.