Symptoms of Addison's disease
The symptoms of adrenal insufficiency usually begin gradually. Characteristics of the disease are

chronic, worsening fatigue
muscle weakness
loss of appetite
weight loss
About 50 percent of the time, one will notice

nausea
vomiting
diarrhea
Other symptoms include

low blood pressure that falls further when standing, causing dizziness or fainting
skin changes in Addison's disease, with areas of hyperpigmentation, or dark tanning, covering exposed and nonexposed parts of the body; this darkening of the skin is most visible on scars; skin folds; pressure points such as the elbows, knees, knuckles, and toes; lips; and mucous membranes
Addison's disease can cause irritability and depression. Because of salt loss, a craving for salty foods also is common. Hypoglycemia, or low blood glucose, is more severe in children than in adults. In women, menstrual periods may become irregular or stop.

Because the symptoms progress slowly, they are usually ignored until a stressful event like an illness or an accident causes them to become worse. This is called an addisonian crisis, or acute adrenal insufficiency. In most cases, symptoms are severe enough that patients seek medical treatment before a crisis occurs. However, in about 25 percent of patients, symptoms first appear during an addisonian crisis.

Symptoms of an addisonian crisis include

sudden penetrating pain in the lower back, abdomen, or legs
severe vomiting and diarrhea
dehydration
low blood pressure
loss of consciousness
Left untreated, an addisonian crisis can be fatal.
^{Note : Information herein is provided for informational purposes only and is not a substitute for professional medical advice. You should not use this information for diagnosing or treating a medical or health condition. If you have or suspect you have a medical problem, promptly contact your professional healthcare provider. Please consult your healthcare provider before beginning any course of supplementation or treatment}.
Content Courtesy : www.niddk.nih.gov