The thyroid plays a big role in how your body functions. It regulates your metabolism, impacts your emotional health, and affects almost every organ in your body. Hypothyroidism occurs when the thyroid doesn’t produce enough hormones, and hyperthyroidism occurs when it overproduces thyroid hormone. The effects of untreated thyroid disease can be serious. If you experience symptoms of either disorder, consult your Baylor St. Luke’s Medical Group primary care physician or endocrinologist.