How do I know if I have a Thyroid problem We’ve all heard the terms “Hyperthyroidism” and “Hypothyroidism” and more often than not,these two terms are casually used in lieu of the other whichever one is more conveniently remembered. But what’s really the deal with these “thyroidisms?” Let’s start by defining what gland is affected by both these afflictions. The Thyroid Gland is a large ductless gland in the neck which secretes hormones regulating growth and development.