The thyroid gland in the neck produces insufficient thyroid hormones to meet the body's needs, a condition known as hypothyroidism. These hormones are essential for controlling the metabolism among other body processes. Many symptoms, including fatigue, weight gain, sensitivity to cold, and others, may arise from a deficiency.
Hashimoto's thyroiditis, an autoimmune disorder in which the immune system unintentionally targets the thyroid gland, is...