Stress is part of life. When the body is in chronically stressed state, you mat experience adrenal fatigue or exhaustion.
Cortisol is a hormone that is made by the adrenal glands, and the pituitary gland tells the adrenal glands how much cortisol to make in response to stress, inflammation, regulating blood sugar and metabolism and controlling blood pressure.
Cortisol is released in a diurnal pattern, usually high in the morning and trails down through the day.