What is Thyroid and its types?

Thyroid is one of the Endocrine Gland it is found in the neck, inferior to (below) the thyroid cartilage (which forms the laryngeal prominence, or 'Adam's Apple') .The gland controls the energy which is being utilized and some other hormones.Thyroid hormones are produced which are triiodothyronine and thyroxine.Hormonal output from the thyroid is regulated by TSH.Disorders of the thyroid gland fall into the following two categories:

Hyperthyroidism is the overproduction of the thyroid hormones T₃ and T_4.It shows symptoms such as a thyroid goiter, protruding eyes, excessive sweating,weight loss and muscle weakness,

Hypothyroidism is the underproduction of the thyroid hormones T₃ and T₄. Hypothyroid disorders may occur as a result of congenital thyroid abnormalities, autoimmune disorders or the removal of the thyroid following surgery to treat severe hyperthyroidism and/or thyroid cancer.Symptoms are abnormal weight gain, tiredness, baldness, cold intolerance.