I have a tsh level of 0.21 does my dose need to be increased or decreased. this thyroid diagnosis still confuses me after 5 yrs .

If the units of this: TSH level are the usual ... mIU/L ... then the value you report is a little low and suggests that your thyroid function is overactive. The TSH, thyroid stimulating hormone, is a controlling hormone of thyroxine. So when TSH is high, thyroid function is low, i.e. hypothyroidism. Alternatively, when TSH is low, the thyroid is likely to be overactive, hyperthyroidism. Discuss a dose change with Doc.