No, ab a simple blood test revealed it in my case.I had to ask the GP to do one though, as I suspected I had an under active thyroid.Like Jane says Levithyroxine seems to work ( or help) anyway.
My symptoms, for anyone out there who may think that they have a problem, was unexplained tiredness, weight gain and losing eyebrows!
Retiring and living frugally in money from downsizing after years of stress

