Addison's disease is most common in people between the ages of 30 and 50, but can affect people of any age. It is more common in women than in men. People with a family history of the disease are at higher risk. It is also more common in certain ethnic groups, such as people of African, Scandinavian, or Ashkenazi Jewish descent. Additionally, people with certain autoimmune diseases, such as type 1 diabetes, celiac disease, or rheumatoid arthritis, are at a higher risk of developing Addison's disease. Other risk factors include certain infections, such as tuberculosis, HIV, and fungal infections, as well as certain medications. Finally, those exposed to environmental toxins, such as pesticides and fungicides, may also be at an increased risk.