Originally Posted by Maryee
Could anyone be so kind as to explain to me what the urine sample will tell and I don't understand the bit about the pituitary gland producing excess TSH bit either?!
The Urine might be for a Cortisol level, but there's no way to know without asking.
A little lesson in thyroid levels and how they are regulated in your body:
1. Your thyroid gland makes thyroid hormone and releases them into your blood for use.
2. Your Hypothalamus measures how much T3 and T4 is in your blood, and releases a corresponding amount of TRH.
3. Your Pituitary gland "measures how much TRH is in your blood and releases a corresponding amount of TSH.
4. Your thyroid gland releases tyhyroid hormones into the blood based on how much TSH it "measures"
5. Go back to number 2.
As you can see it is an indirect process. An elevated TSH indicates that your body (as indicated by yout hypothalamus and pituitary) is crying out for more thyroid hormone and your thyroid gland is not able to keep up with the demand. I disagree with your doc about your thyroid being "normal" as the TSH tells us it isn't.
The T4 being "borderline low" is the reason for much of your symptoms. Your T3 is in the middle of the range and is the most "normal" test you posted, but many people do better if it is a bit higher, still.