Hello Doctor, Earlier this year , I started getting lightheaded and dizzy, my doctor said my thyroid which is low went high and this the cause for the dizziness, they changed my thyroid pills a few times from low to high and then I started getting a ringing in my ears about 3 weeks ago..could my thyroid started it ?. right now I am on 100mcg and my ears ringing also , I am dizzy and wobbly..thanks for your reply