Addison's disease is a rare disorder that occurs when the adrenal glands do not produce enough hormones, particularly cortisol and aldosterone. These hormones are essential for regulating various bodily functions, including metabolism, blood pressure, and the body's response to stress. Symptoms can include fatigue, weight loss, low blood pressure, and darkening of the skin. The condition can be caused by autoimmune diseases, infections, or other factors that damage the adrenal glands. Treatment typically involves hormone replacement therapy to help manage symptoms and maintain normal hormone levels. With proper care, individuals with Addison's disease can lead healthy lives.