Lupus is a medical condition that results in the body’s immune system attacking its organs and tissues through inflammation. It is categorized under autoimmune diseases. When the body’s defense mechanisms are working correctly, they recognize bacteria and other disease-causing organisms and eliminate them. When someone is suffering from lupus, however, the body’s immune system is unable to differentiate between bacteria and healthy tissues. The body’s main form of defense, autoantibodies, ends up attacking healthy tissues and organs. Lupus can result in damage to the blood cells as well as the joints, heart, lungs, and brain. In some cases, lupus can also affect the kidneys. The Lupus Foundation of America explains that this medical condition is characterized by a flow of flares and remissions. As such, the disease’s conditions will continuously oscillate between worsening and improving. Notably, lupus is not contagious.