The document discusses two common types of arthritis: osteoarthritis and rheumatoid arthritis. It provides information on symptoms, causes, risk factors, diagnosis, and treatment for each type. For osteoarthritis, it describes symptoms like joint pain and stiffness. Common causes are age, injury, weight, and genetics. Treatments include medications, physical therapy, and surgery. For rheumatoid arthritis, it notes it is an autoimmune disease causing joint and tissue inflammation, with symptoms of swelling and joint tenderness in multiple joints. Diagnosis involves physical exams, blood tests, and imaging. Treatments include medications and surgery.