Lupus is a long-term autoimmune disease. This means that your immune system attacks your body's healthy tissues. Lupus may cause problems with your skin, kidneys, heart, lungs, nerves, or blood cells.
The exact cause of lupus isn't known. Experts believe that some people are born with certain genetic mutations that affect their immune systems and make them more likely to get lupus.
When you have lupus symptoms, you are having flares or relapses. When your symptoms get better, you are in remission. Lupus can't be cured, but home treatment and medicine can help control the symptoms.