Thyroid gland is one of the largest endocrine gland present in the neck, and consists of two connected lobes and secretes hormones regulating growth and development through the rate of metabolism. The thyroid secretes several hormones, collectively called thyroid hormones. The main hormone is thyroxine, also called T4. Thyroid hormones act throughout the body, influencing metabolism, growth and development, and body temperature. During infancy and childhood, adequate thyroid hormone is crucial for brain development. Thyroid disorders can range from a small, harmless goiter that needs no treatment to life-threatening cancer. The most common thyroid problems involve abnormal production of thyroid hormones. Too much thyroid hormone results in a condition known as hyperthyroidism. Insufficient hormone production leads to hypothyroidism. Various methods to treat thyroid disorders include, Thyroid surgery, Antithyroid medications, Radioactive iodine, External radiation, Thyroid hormone pills and Recombinant human TSH.