I recently had blood labs. Everything was ok but my TSH was .009. A yr ago with a different Dr it was <.05 .At that time my T4 was 1.08. This time it was .93. The next day I had a thyroid ultrasound, awaiting results now. My 82 yr old mother and 101 yr old grandmother have been on thyroid for DECADES due to hypothyroidism. I am baffled by this prospect of hyperthyroidism. I am 57, overweight. I am on Celexa 40 mg, Trazodone 100 mg and Lasix 20 mg. I have blurred vision, high levels of anxiety though I have been a low-key person most of my life, concentration and memory problems, heart palpatations. I want to know how low .009 really is. I have searched the web and only know about the new standardized ranges.
This low TSH with a normal T4 is called subclinical hyperthyroidism. It looks like it is been present for over a year. This may be due to over functioning thyroid nodules or Graves' disease. Additional testing will likely be required to confirm the cause so that treatment options can be discussed. In general we treat with either methimazole or radioactive iodine for hyperthyroidism. Given the symptoms that you have it is recommended to normalize your thyroid function. You should probably see an endocrinologist if you are not already doing so.
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