Elevated TSH levels signify that the thyroid gland is not functioning optimally, resulting in insufficient production of thyroid hormones like T3 and T4. When the thyroid gland fails to produce adequate hormones, the pituitary gland responds by increasing its stimulation of the thyroid, leading to a rise in Thyroid-Stimulating Hormone (TSH).

A TSH test result above 3.90 is widely considered a potential indicator of a thyroid issue, both globally and in our country, where it is used as a screening test. Such elevated values may suggest an underactive thyroid (hypothyroidism), pituitary gland tumors, or problems with medication adherence for patients undergoing thyroid treatment. Additionally, high TSH can stem from an autoimmune disease or, in certain instances, from excessive dietary salt intake.