Rheumatoid arthritis is a chronic systemic autoimmune disease characterized by synovitis of the joints. The persistent and recurrent attacks of synovitis can lead to destruction of cartilage and bone in the joints, joint dysfunction, and even disability. Vasculitis lesions involve all organs of the body, so the disease is also known as rheumatoid disease. Rheumatoid arthritis can have the following characteristics: 1. It mainly affects small joints (especially the metacarpophalangeal joints, proximal interphalangeal joints, and wrist joints) but also other large and small joints. Morning stiffness lasting no more than one hour, or no morning stiffness due to pain; 2. Significant joint swelling and pain, accompanied by mild edema of the peri-articular tissues and limited or complete immobility of the joints; 3. Irreversible severe joint deformity, ankylosis, or complete loss of function; 4. The presence of rheumatoid nodules and visceral lesions of the heart, lungs, kidneys, peripheral nerves, and eyes; In severe cases of rheumatoid arthritis, the disease eventually develops into Complete disability, having to live in bed or on crutches or wheelchairs. Some patients fail to seek medical attention in time for initial joint swelling and pain, and treatment increases when the disease develops into widespread lesions and deformation of joints throughout the body. Therefore, once you have rheumatoid arthritis, it is important to treat it early to avoid lifelong regrets.