In economics, a shortage or excess demand is a situation in which the demand for a product or service exceeds its supply in a market. It is the opposite of an excess supply.
The disease is characterized by weight loss, muscle weakness, fatigue, low blood pressure, and sometimes darkening of the skin in both exposed and nonexposed parts of the body. Addison's disease occurs when the adrenal glands do not produce enough of the hormone cortisol and in some cases, the hormone aldosterone. For this reason, the disease is sometimes called chronic adrenal insufficiency, or hypocortisolism.
Addison's disease can affect people of all ages, but the most commonly affected age group is adults 30 to 50 years old. Though the disease affects most people similarly, there are a few differences between the way it affects adults and the way it affects children. The cause of Addison's disease is one of those major differences.