Autoimmune diseases account for a large portion of the conditions that affect women more than men. In fact, 75 percent of Americans with autoimmune diseases are women. If you have an autoimmune condition, it means that your immune system isn’t working correctly. Usually, that indicates either there is low activity of your immune system or it’s attacking and damaging your body’s own tissues. Here are some of the most common autoimmune disorders that affect women and the symptoms associated with each of them.