Rheumatoid arthritis (RA) is an autoimmune disease where the body's immune system mistakenly attacks joints, causing inflammation, pain, swelling, and stiffness. Early symptoms commonly include morning stiffness lasting over 30 minutes, mild joint pain, and swelling primarily in small joints like fingers, wrists, and toes, often symmetrically. As the disease advances, joint deformities, reduced range of motion, and severe pain may develop, along with inflammation affecting organs like lungs and eyes. Treatment strategies involve disease-modifying antirheumatic drugs (DMARDs), biologics, corticosteroids, and physical therapy to manage symptoms and slow progression. For expert care, consult rheumatologists at specialized arthritis centers or large hospitals with strong rheumatology departments. Managing flare-ups includes medication adherence, rest, gentle exercise, and avoiding joint strain. Long-term treatment costs vary depending on medication type, with biologics being more expensive, but many insurance plans and assistance programs can help. Early diagnosis and treatment are key to minimizing joint damage and maintaining quality of life.