I consider the thyroid issue to be the easiest to deal with.
Obviously depends on exactly “what” the thyroid “issue” is as they are clearly not all the same nor respond equally to treatment.
In our case, one pill per day and done.
In terms of diagnosis, we started with the antibody tests in conjunction with the various TSH,T3,T4 level testing. The antibody testing was very clear so there was little doubt where this was ultimately headed. We ran the tests maybe every six months? In conjunction with our Endo, we decided to start on the synthroid when we saw the TSH/T3/T4 (forget which ones exactly now) starting to change. We have done many tests at this point, so we had a very good idea of the typical fluctuations and then waited to see the change in level which was repeated with increase change in the following test.
IMHO, any relevant symptoms are just as important as the TSH,T3,T4 levels. I do not think these tests are one of those where a particular range/number is really the proper range/number for everybody. If there is no real downside to the meds and the numbers are in the ballpark for a prescription (even if not technically “there”) and you have symptoms to boot - a good discussion with the Doc may be helpful. My point of view would be try the med, followup with the Doc and bloodwork. If the TSH,T3,T4 numbers move back towards ideal range as well as reduction of symptoms then maybe that works for you?
The Thyroid antibody testing, I think is very cut and dry at certain results.
The TSH,T3,T4 - I think these are lot more fuzzy.