Thyroiditis: Inflammation of the thyroid gland which is located in front of the neck:
The inflamed thyroid gland can release an excess of thyroid hormones into the blood stream, resulting in a temporary hyperthyroid state. Once the thyroid gland is depleted of thyroid hormones, the patient commonly goes through a hypothyroid (low thyroid) phase. This phase can last 3-6 months until the thyroid gland fully recovers. Thyroiditis can be diagnosed by a thyroid scan (a picture taken of the thyroid gland after radioactive iodine is taken by mouth).