Tinnitus is a common symptom of hypothyroidism. It is likely that your med/dosage is not adequate to raise the levels of your biologically active thyroid hormones, Free T4 and Free T3.
Do you have any other symptoms? What is your med and dosage? Please post your thyroid related test results and reference ranges shown on the lab report.
Did you ever cure your tinnitus? If so, what worked for you? I had my thyroid removed in January 2016 and two weeks after my ears started ringing all the time and have never stopped.
Wanted to see how your tinnitus is? I too am on 100mcg of Synthroid and have horrible ringing in my ears. My endo does not think it has anything to do with my thyroid. Please let me know if the Armour ended up helping your tinnitus.
Thanks you!