Rheumatoid arthritis is a chronic systemic autoimmune disease characterized by synovitis of the joints. Persistent and recurrent attacks of synovitis can lead to destruction of cartilage and bone in the joints, joint dysfunction, and eventually to joint ankylosis and deformity. In addition to the joints, other organs or tissues of the body may be involved, including subcutaneous tissue, heart, blood vessels, lungs, spleen, lymph nodes, eyes, and plasma membranes. The age of onset of the disease is mostly between 25 and 55 years old, but it is also seen in children. The incidence is two to three times higher in women than in men. The disease has a chronic course with repeated alternations of progression and remission. Its prominent early clinical manifestations are symmetrical multi-joint redness, swelling and pain, common small joints of the extremities, swelling of the proximal interphalangeal joints, metacarpophalangeal (metatarsal toe), wrist, knee, elbow, ankle and even temporomandibular joints, swelling and pain and difficulty in movement, joint stiffness in the morning, gradually decreasing in the afternoon, extra-articular symptoms may appear in about 20% of patients with subcutaneous nodules. It can also damage other organs besides the joints. For example, damage to the blood system may lead to anemia. The clinical manifestations are complex, so it is recommended to visit a specialist hospital. Due to the lack of understanding of rheumatoid arthritis, some rheumatoid patients are treated with high doses of hormonal drugs, but they only treat the symptoms but not the root cause. Long-term use can lead to many complications and jeopardize health.