According to The Lupus Foundation of America, around 1.5 million Americans, and at least 5 million people worldwide, are suffering from some form of lupus. Lupus is a chronic inflammatory autoimmune disease caused by an anomaly in the immune system. Each case of lupus is unique, because the condition can affect different organs and different parts of the body.
The condition can be difficult to diagnose, as symptoms often overlap with those caused by other illnesses. The four types of lupus are: