This test examines your levels of TSH and free thyroxine (FT4.) It can be used to help diagnose a thyroid disorder. It is important to diagnose and correct a thyroid problem. Both an overactive and underactive thyroid can cause serious health risks is left untreated. An underactive thyroid can cause weight gain, dry skin/hair and fatigue. An overactive thyroid can cause you to feel sensitive to hear, often anxious and have trouble gaining weight.
This test includes (expand individual tests for details):
Thyroid Stimulating Hormone (TSH) is produced in the pituitary gland. It tells the thyroid gland to produce thyroid hormones (T3 & T4.) High levels of TSH indicate an underactive thyroid while low levels indicate an overactive thyroid.
Thyroxine (T4) is one of two major hormones produced by the thyroid gland (the other is called triiodothyronine (T3)). This test can tell whether the thyroid is performing properly. Thyroid hormones help regulate your metabolism (how the body functions).