Discussions By Condition: Medical Stories

Thyroid-Low TSH level, normal Free t4 Level

Posted In: Medical Stories 1 Replies
  • Posted By: Anonymous
  • September 14, 2009
  • 03:03 PM

I was recently told that I possibly have hyperthyroidism. My lab results showed my TSH was .23 (which is lower than the standard) and my T4 Free was 1.01 (normal levels I was told are .89-1.76). I am just wondering how I could possibly have hyperthyroidism if my T4 is normal and my TSH is low? My sister has hyperthyroidism and I have been expirencing alot of problems such as, vision issues, rapid heart beat, panic feelings, anixety, stomach issues, just to name a few. Can anyone explain to me how I could possibly have hyperthyroidism without have a low/high T4 Free level? I am scheduled to go to a specialist in a month but I don't want to go if I am just going to be told that it can be normal. Any advice would be appreciated. Thanks!

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1 Replies:

  • Your T4's are normal while not being stimulated by the TSH. Meaning your thryoid is overactive because it's working at normal levels without the normal amount of stimulating hormone it should be getting. This is usually called subclinical hyperthyroidism.
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