Blotchy, dark tanning and freckling of the skin. This is most noticeable on parts of the body exposed to the sun, but also occurs in unexposed areas like the gums. Darkened skin is particularly likely to occur on the forehead, knees, and elbows or along scars, skin folds, and creases (such as on the palms).
Because symptoms of Addison's disease progress slowly, they may go unrecognized until a physically stressful event, such as another illness, surgery, or an accident, worsens symptoms quickly. When this happens, it's called an Addisonian crisis. For one in four people with Addison's disease, this is the first time they realize they are ill. An Addisonian crisis is considered a medical emergency because it can be fatal.
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Symptoms of an Addisonian crisis include:
Shock, when the body does not get enough blood flow
Sudden penetrating pain in the lower back, abdomen, or legs