Low adrenal function
The adrenal glands make a number of different hormones, most importantly cortisol.
When a person's adrenals cannot make normal amounts of cortisol, they are diagnosed with adrenal insufficiency
, or failure. This can be due to a problem in the adrenals (infection, tumor, bleeding, auto-immune destruction) or in the pituitary or parts of the brain that control the adrenals.