The thyroid is a small, butterfly shaped gland resting just above the collar bone and below the Adam's apple. It rests over the trachea or windpipe and is attached in the middle by the isthmus

The thyroid gland controls or contributes to many functions in your body. As part of the endocrine system, the thyroid controls your body's energy level. Your body needs the thyroid gland to function properly in order maintain good health.