4. Hypothyroidism secondary to pituitary hypofunction
This pattern is associated with chronic stress levels or chronic infections. Your thyroid only does what your brain tells it to do. The hypothalamic-pituitary-thyroid (HPT) axis is the communication lines between your brain and thyroid. In this pattern the pituitary gland, which sits at the base of your brain, isn’t communicating with your thyroid gland. There’s nothing wrong with the thyroid itself; it’s just not being told to get to work!