12 Types of Arthritis and How They Differ

2. Rheumatoid Arthritis - The Autoimmune Assault

Rheumatoid arthritis represents a chronic, systemic autoimmune disorder that affects approximately 1.3 million Americans, with women being three times more likely to develop the condition than men. Unlike osteoarthritis, rheumatoid arthritis occurs when the immune system mistakenly attacks the synovium, the thin membrane that lines the joints, causing inflammation that can eventually destroy cartilage and bone. This condition typically affects joints symmetrically, meaning if one knee or hand is affected, the other usually is as well, and commonly targets smaller joints first, such as those in the hands and feet, before progressing to larger joints. The inflammatory nature of rheumatoid arthritis means that patients often experience systemic symptoms beyond joint pain, including fatigue, low-grade fever, loss of appetite, and morning stiffness that can last for hours. Laboratory tests reveal elevated inflammatory markers such as C-reactive protein and erythrocyte sedimentation rate, along with specific antibodies like rheumatoid factor and anti-cyclic citrullinated peptide antibodies. Early diagnosis and aggressive treatment with disease-modifying antirheumatic drugs (DMARDs) are crucial, as the condition can cause irreversible joint damage within the first two years if left untreated. The chronic inflammation associated with rheumatoid arthritis also increases the risk of cardiovascular disease, osteoporosis, and other systemic complications.