Generally, having your period does not cause a sudden, significant spike in TSH levels while taking Thyronorm (levothyroxine). While monthly hormonal shifts can cause minor thyroid fluctuations, a sudden spike is more likely due to other factors. These can include missing a dose, taking your medication with food or coffee, stress, or starting other medications. Please don't worry?this is very common and highly manageable. I recommend discussing this result with your doctor, who can help identify the cause and safely adjust your levothyroxine dose if needed.
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Can having your period affect your thyroid (TSH) blood test results and cause a sudden spike while taking Thyronorm?