Hyperthyroidism

A Basic Overview of hyperthyroidism focused on primary hyperthyroidism

Hyperthyroidism is a medical condition in which the thyroid overproduces thyroid hormones T3 and T4. A patient will need to know the basics of general thyroid function before understanding thyroid diseases, specifically hyperthyroidism. Although there are only many causes of hyperthyroidism, dysfunction of the thyroid gland itself is the most common reason for high thyroid function.The terminology for high thyroid function can be confusing since diagnosing hyperthyrodism (high thyroid function) is usually found with a low Thyroid Stimulating Hormone (TSH) value.

As depicted in the diagram, in 'primary hyperthyroidism' the TSH is usually low because decreased feedback of thyroid hormones from the thyroid gland causes the pituitary to stop stimulating the thyroid gland to produce more hormone. This TSH value has a very wide range of normal and there are some common misconceptions about the test. The endocrinologists at Houston Thyroid and Endocrine Specialists will review your symptoms in conjunction with blood analysis to determine if there is a problem. Depending on the exact cause of the low thyroid function, medical treatment of hyperthyroidism may or may not be indicated.