Systemic lupus erythematosus is a rare, chronic autoimmune disease that can affect multiple organ systems. It is characterized by hyperactivity of B lymphocytes and autoantibodies that can cause tissue damage. Common symptoms include arthritis, skin rashes, kidney issues, and fatigue. Diagnosis requires meeting certain criteria related to constitutional symptoms, skin and joint involvement, serological markers, and organ system dysfunction. Treatment focuses on managing symptoms and preventing disease flares and organ damage using medications like corticosteroids, immunosuppressants, and hydroxychloroquine. Prognosis has improved but risks of infection and accelerated cardiovascular disease remain higher than the general population.