Thyroid condition is a medical condition in which the thyroid gland is not functioning properly, which can lead to a variety of symptoms. The thyroid gland is a small, butterfly-shaped gland located in the neck, just below the Adam's apple. It produces hormones which regulate metabolism, and any disruption in the production of these hormones can cause a number of health problems. Common symptoms of a thyroid condition include fatigue, weight gain, cold intolerance, difficulty concentrating, dry skin, and depression. In addition, some people may experience difficulty breathing, rapid heartbeat, and muscle weakness. In more severe cases, a thyroid disorder can lead to an enlarged thyroid (goiter) or even a life-threatening condition called thyroid storm. The most common thyroid conditions are hypothyroidism and hyperthyroidism. Hypothyroidism is a condition in which the thyroid gland does not produce enough thyroid hormones, leading to a slowed metabolism. Hyperthyroidism is the opposite, and is characterized by an overactive thyroid gland which produces too much of the hormones. Thyroid conditions can be managed with medication, lifestyle changes, and sometimes surgery. The type of treatment and the long-term outlook depend on the underlying cause, and the severity of the condition. With the proper treatment, most people with a thyroid condition can enjoy a good quality of life.