What is thyrotoxicosis?

Thyrotoxicosis is a condition that develops when there is an excess amount of thyroid hormone in the body. Different processes may lead to the accumulation of excess amounts of thyroid hormone. In some circumstances, thyroid tissue may become overactive, producing and secreting increased amounts of thyroid hormone. Over time the amount of thyroid hormone produced by overactive thyroid tissue may exceed the level required to maintain normal functioning of organs and tissues throughout the body. If the amount of thyroid hormone present in the body increases to the point where it overwhelms the control normally exerted by the pituitary gland, the overactive thyroid tissue is said to be autonomously functioning. In other circumstances, the thyroid gland may be producing normal amounts of thyroid hormone, but inflammation may lead to gradual destruction of normally functioning thyroid tissue. This may lead to the uncontrolled release of excess amounts of thyroid hormone. Patients who are taking preparations of thyroid hormone for the treatment of thyroid disorders may ingest doses that are higher than the daily amounts needed to maintain normal functioning of organs and tissues. Over time this may lead to the accumulation of excess amounts of thyroid hormone in the body.