What is thyroid disease?
A person with thyroid disease has a disorder that affects the function of the thyroid gland, which is located in the neck. The thyroid gland produces a hormone that helps to regulate metabolism. Thyroid disease may affect the activity of the thyroid gland, resulting in hyperthyroidism or hypothyroidism. Hyperthyroidism describes an over-active thyroid gland. The most common cause of hyperthyroidism is Grave's disease. Hypothyroidism describes an under-active thyroid gland. The most common cause of hypothyroidism is Hashimoto's thyroiditis.

What are the symptoms of thyroid disease?
The symptoms of thyroid disease depend on the cause. Thyroid disease may result in hypothyroidism symptoms or hyperthyroidism symptoms.

How does the doctor treat thyroid disease?
Treatment for thyroid disease depends on the cause. Treatment for thyroid disease may include thyroid hormone supplements, radioactive iodine therapy, or surgery.