Simple rheumatoid arthritis can be cured after standardized treatment, while patients with serious condition, untimely treatment and repeated attacks may die or develop chronic rheumatic heart valve disease. Rheumatoid arthritis is a kind of reactive arthritis caused by A-type hemolytic streptococcal infection, and the main symptoms of patients are redness, swelling and pain in joints, etc. Simple rheumatoid arthritis can be cured after standardized treatment, but it is easy to recur, and some of the patients will develop heart valve disease, and the combination of heart inflammation, heart failure, etc. can be life-threatening if it is not treated in time or improperly treated. The disease is mainly treated with medications, including non-steroidal anti-inflammatory drugs (e.g., aspirin), glucocorticoids (e.g., prednisone), and anti-infective treatments against Streptococcus aureus (e.g., penicillin). After treatment, the joint symptoms usually subside in about 6-8 weeks, and the carditis can be treated for at least 12 weeks. Patients diagnosed with rheumatoid arthritis are advised to go to the rheumatology and immunology departments of regular hospitals for detailed consultation.