Rheumatoid arthritis often involves the finger joints and wrist joints, with the proximal interphalangeal joints and metacarpophalangeal joints being the main joints involved in rheumatoid arthritis. Typical clinical manifestations are symmetrical swelling and pain in the finger or wrist joints, accompanied by morning stiffness in most patients. Other affected joints include knee joints, foot joints, and even temporomandibular joints, spinal joints, and shoulder joints, all of which may be involved. In addition to joint manifestations, patients may also have organ involvement, such as pericarditis and endocarditis. If the lungs are involved, it may cause interstitial lung disease, interstitial lung fibrosis, pleural effusion, etc. Some patients may have glomerulonephritis involving the kidneys, and some patients may also have neurological and hematological disorders.