Low free t4 with low TSH

[ns9797]

Got blood done again recently to Check TSH and t4 levels since I have been digionged with hypothyroidism and been put on t4 for a bout a month on 50mcg. Originally when I got my thyroid checked my TSH came back high and when getting it done again recently it came back low around over a 2.0 drop but my free t4 came back below low end normal. So what’s does it mean when tsh is low and free t4 is below low normal?

[thisAngelBites]

It would be helpful for you to include your actual test results as well as the reference ranges your lab is using. Also, when did you take the dose of T4 relative to when the blood was taken for the tests. Lastly, how do you feel? Was the hypothyroidism found because you complained of symptoms and then some testing was done, or because your physician did a screen and found the aberrant results?