If a person’s thyroid gland is secreting levels of hormones that are too high, the pituitary gland produces less TSH. The TSH test involves a healthcare professional drawing blood from a vein in ...

In addition, thyroiditis, or the inflammation of your thyroid gland can cause thyroid nodules ... is a type of biopsy that involves drawing cells from the nodule using a thin needle.

The test will involve a blood draw, usually first thing in the morning ... it produces less TSH to stop the thyroid glands from producing more thyroid hormone. As a result, a low TSH level ...