Hypothyroidism is the opposite of hyperthyroidism – or overactive thyroid – a condition in which the thyroid gland makes too much thyroxine.
Not having enough thyroxine can cause unpleasant symptoms throughout your body because thyroxine helps control how your body uses energy and how well your cells, tissues and organs work.
Did you know?
Millions of Americans suffer from hypothyroidism.4
Though anyone can develop hypothyroidism, you are at increased risk if you are female, age 60 and older, or have a family history of hypothyroidism.
Test Your Knowledge
A common hypothyroidism symptom is feeling fatigue.
1. AACE Thyroid Awareness Web site. http://www.thyroidawareness.com/about-your-thyroid. Accessed February 27, 2012.
2. American Thyroid Association. Hypothyroidism. A booklet for patients and their families. http://www.thyroid.org/wp-content/uploads/patients/brochures/Hypothyroidism_web_booklet.pdf. Published 2013. Accessed January 23, 2014.
3. American Association of Clinical Endocrinologists. Thyroid Brochures. Hypothyroidism. Available at: http://www.thyroid.org/wp-content/uploads/patients/brochures/Hypo_brochure.pdf. Accessed March 1, 2013.
4. Hypothyroidism: Too Little Thyroid Hormone. EndocrineWeb. http://www.endocrineweb.com/conditions/thyroid/hypothyroidism-too-little-thyroid-hormone. Updated October 18, 2012. Accessed January 23, 2014.