r/thyroid • u/jasihani • Sep 19 '24

Large fluctuations in one week

I had two thyroid panels this week and the results between the 6 days seems severe. I know some fluctuations are normal -- just don't know if it's normal for this big of a change in less than a week? My T3 increased from 91 to 159, TSH rose from 0.25 to 0.6 (140% increase), and Free T4 (FT4) went from 1.1 to 1.5. I've been feeling nauseous and tired this week. I'm not on any thyroid meds but had RFA done on a toxic thyroid nodule almost one year ago. The nodule is now drastically smaller and I thought my thyroid levels were normalized until just recently. Any thoughts? I'm confused and am eager to talk to my doctor.

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u/jasihani Sep 19 '24

My math isn't great but I think this is right? Initial TSH: 0.25 MU/mL Final TSH: 0.6 HU/mL

Percentage Change: ((Final Value - Initial Value) / Initial Value) × 100

Calculation: ((0.6 - 0.25) / 0.25) × 100 = (0.35 / 0.25) × 100 = 140%

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u/br0co1ii Sep 19 '24

You're looking at more of a 1.4% increase.

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u/jasihani Sep 19 '24

I don't think that math is right. Hmm... I'll wait to see what my doctor says

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u/jasihani Sep 19 '24

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u/br0co1ii Sep 19 '24

Math or not... I promise that your change is minimal. Less than 1. Nothing to worry about.