Is it life threatening to have a Tsh level of 0.01 Free T3 (liothyronine) 4.3 Free T4 1.8 I know TSH is not normal but how dangerous is this? Thy ultrasound today.

Thyroid. With a normal Free T3 (liothyronine) and FT4, I would not consider this dangerous, unless you are having symptoms of hyperthyroidism, such as increased blood pressure, rapid heart rate, sweating, anxiety, etc. The numbers are not so important, it's what your body is saying. Also, the normal T3 (liothyronine) and T4 are reassuring.