This document provides an overview of rheumatoid arthritis (RA), including its causes, symptoms, stages, risk factors, diagnosis, treatment options, and living with the disease. RA is an autoimmune disease where the immune system mistakenly attacks the joints, causing inflammation and damage. Symptoms include pain, stiffness, and swelling in the small joints. Diagnosis involves blood tests, scans of affected joints, and a physical exam. Treatment options include medications like NSAIDs, steroids, DMARDs, biologics, as well as surgery and physical/occupational therapy.