Patients with rheumatic fever who develop a fever can first use non-steroidal anti-inflammatory drugs (NSAIDs) such as sustained-release diclofenac sodium tablets for symptomatic fever reduction. At the same time, it is also necessary to actively treat the primary disease of rheumatic fever. If the rheumatic fever is induced by a streptococcal infection, additional anti-infection treatment is also needed. Furthermore, as rheumatic fever is also an autoimmune disease, while using NSAIDs to reduce fever, it is also necessary to add some immunosuppressants, such as methotrexate or leflunomide, to control the condition. Only on the basis of controlling the condition can rheumatic fever potentially be completely cured. (The use of medications should be under the guidance of a doctor.)