The thyroid is a small gland at the bottom of the neck that helps control your body's metabolism. A medical difficulty that affects the thyroid can disrupt these key bodily processes.
- Having had thyroid surgery or radiation therapy intended for thyroid.
- Having an existing thyroid situation.
- Having a goiter.
- Having type 1 diabetes.
- Having hair that turned gray in advance.
- Having the skin condition vitiligo.