A member asked:

What causes tsh level to go up and down without medication?

A doctor has provided 1 answer

Thyroid inflammation: Can cause variable TSH results. Tsh tests are very sensitive but often not real reproducible. Levels vary by time of day. Tsh is secreted in spurts and may vary depending upon when it's drawn. Plus some labs are better and more reliable than others.

Answered 11/18/2015

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