Fluctuating TSH / thyroid - normal or weird?
July 4, 2008 2:39 PM Subscribe
[Thyroid/CFS-Filter] Do TSH and thyroid levels typically fluctuate within a period of weeks? If so, how much fluctuation is normal?
posted by anonymous to Health & Fitness (9 answers total) 1 user marked this as a favorite
I've looked at previous thyroid questions before but couldn't find any that answered my specific questions... and I know, YANMD. I'll be seeing a doctor next week - but then, I've also seen about 3 doctors this year, with varying results.
I was diagnosed with CFS at the beginning of this year. As a teenager, I went through a period of subclinical hypothyroidism for about a year or so. During the past two years (I'm in my early twenties now), I started experiencing some symptoms of hypothyroidism, the more persistent symptoms being coldness and numbness in extremities, fatigue, dry skin, low blood pressure, hair loss, cold intolerance, constipation, increased sleepiness, inability to concentrate/focus and depression. About 3 months ago, I got my TSH and free T4 tested - which turned out to be 5.082 mIU/L and 14.48 pmol/L respectively. Six and a half weeks after that test, I had another thyroid test done: my TSH was 2.21 mIU/L, free T4 was 18.65 pmol/L and T3 (which hadn't been tested previously) was 1.32 nmol/L.
I had no treatment between the tests (the tests were administered by different doctors), and to my memory, did not make any changes to my diet or the supplements (vitamins and minerals) I was taking. For each test, the doctor administering the test pronounced me healthy and said I had no thyroid problems.
Up until now, I've figured my symptoms were/are just part of the CFS. But I was just looking at the test results again and wondering why my TSH and free T4 seem to fluctuate quite a bit (?) within 6.5 weeks when I didn't really make any changes to my diet or lifestyle, let alone take any hormone supplements. Is this normal? Am I overthinking this?