Clinical Features of Addison's Disease (2)	

In acute adrenal failure occurring de novo (e.g. as with a septicaemia), the patient will not be pigmented and the symptoms will usually be weakness, malaise, nausea (often with vomiting), and non-specific  or vague epigastic abdominal pain associated with constipation or diarrhoea. A cardinal physical sign is postural hypotension. 
In chronic adrenal insufficiency, many of the same features are present, but the presentation is much more vague. 

See later:
• Facial Pigmentation in Addison's Disease
• Vitiligo in Addison's Disease
• Other Clinical Features in Addison's Disease