Rheumatoid arthritis is categorized as an autoimmune disease and is a chronic autoimmune condition that is destructive to joints. It is primarily characterized by symmetric polyarthritis, with clinical manifestations varying significantly among individuals. Most cases begin gradually, initially presenting with symmetrical pain and swelling in the wrists. This often accompanies morning stiffness, fatigue, low-grade fever, muscle pain, or weight loss. In a minority of cases, the onset is more abrupt, with typical clinical manifestations appearing within a few days, including joint dysfunction, morning stiffness, and joint pain and swelling. Joint deformity is a later manifestation of the disease, indicating that the disease was not well-controlled, leading to joint damage.