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Introduction
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The thyroid gland is a butterfly-shaped gland located at the base of the neck which secretes T-3 (Triiodothyronine) and T-4 (thyroxine) hormones that play the principal role in regulating metabolism, maintaining body temperature, muscle movements and heartbeat.
The state of an underactive thyroid gland is called hypothyroidism and is characterized by symptoms such as weight gain, constipation, fatigue, increased sensitivity to cold, muscle cramps and a puffy looking face.
An overactive thyroid gland results in hyperthyroidism, which is manifested through symptoms like weight loss, hyperactivity, sensitivity to heat, excessive sweating, insomnia and mood swings.
