Rheumatic fever is a delayed, non-suppurative sequelae caused by a streptococcus infection. It primarily presents as arthritis, heart valve disease, chorea, subcutaneous nodules, and erythema, and some cases also exhibit fever. It mainly occurs in adolescents and children aged 5 to 14. It is primarily related to symptoms that appear after an upper respiratory tract streptococcus infection. If the individual has good resistance, symptoms may only resemble those of a cold, such as sore throat, runny nose, and fever, and these symptoms can be relieved after anti-infection treatment without any residual sequelae. However, people with weaker resistance may develop these sequelae after an upper respiratory tract infection, including joint pain and heart valve disease. Therefore, it is crucial to receive proper treatment during the acute phase to prevent any lasting sequelae.