Lupus is a chronic autoimmune disease in which the body's immune system becomes hyperactive and mistakenly attacks normal, healthy tissue. This results in inflammation, swelling, and damage to joints, skin, kidneys, blood, the heart, and lungs. Lupus can affect various parts of the body and its symptoms range from mild to life-threatening.

Onset of lupus can be triggered by various factors, including infections, certain drugs, or even sunlight. Lupus is known for its unpredictable nature, with periods of flares and remissions. Understanding this condition is critical for managing its impact on daily life and long-term health.