Thyroid function is not solely dependent on the thyroid gland itself but is also influenced by the pituitary gland, which produces thyroid-stimulating hormone (TSH). Therefore, when diagnosing thyroid disorders, most cases require a combination of multiple tests to provide a comprehensive evaluation of thyroid function and related hormonal activity.

Stress not only damages the nervous system but can also impact the thyroid gland, potentially causing hyperthyroidism. In recent years, hyperthyroidism has become significantly more prevalent, particularly among women.