lupus definition
Lupus is a chronic inflammatory disease that occurs when your body's immune system attacks your own tissues and organs.Inflammation caused by lupus can affect many different body systems â including your joints, skin, kidneys, blood cells, brain, heart and lungs.Lupus can be difficult to diagnose because its signs and symptoms often mimic those of other ailments.nflammation caused by lupus can affect many different body systems â including your joints, skin, kidneys, blood cells, brain, heart and lungs. Lupus can be difficult to diagnose because its signs and symptoms often mimic those of other ailments.