Help with my son's results please

[Guest guest]

Hello,

My son has recently had his test results back from the doctors. He is currently

taking Levothyroxine at 175mg. His serum free T4 level was 16.5 pmol/l which

fits into the range provided of 12.0 - 22.0. His serum TSH level was below the

normality range at 0.22 miu/l, the reference range provided was 0.35 - 5.5.

He is still complaining he is tired. Would you be able to help me with these

results please? What does a low TSH level mean? His only other medication is

liquid Vitamin B12 injected. He has suffered with Chronic Fatigue for 6 years

and it started with boils.

Thank you very much,

Helen