That is very true. I'm not sure what would have happened if it had gone on much longer untreated. I could have had a heart attack or something for all I know. Supposedly your body will eventually kill its own thyroid gland given enough time. Mine was zapped with radioactive iodine to put an end to the trouble.
Yes, I have no symptoms now and haven't since way back in 1990 when the gland was "fixed." Thank you!