# Daily Archives: February 13, 2015

## About Secondary Hypothyroidism

There are 3 categories of hypothyroidism – primary, secondary and tertiary.  The categorization relates to how ‘far’ up the HPT (hypothalamic/pituitary/thyroid) axis the problem causing the under active thyroid is located. Primary hypothyroidism is when the issue is in the thyroid gland itself. Secondary hypothyroidism is when the problem lies in the pituitary gland and Tertiary hypothyroidism stems from the hypothalamus. Secondary and tertiary hypothyroidism are also referred to as central hypothyroidism and you’ll often […]