Patients with rheumatic heart disease who catch a cold and develop a fever may experience a worsening of their existing rheumatic heart disease, with more severe mitral stenosis or regurgitation, and there could also be recurrent attacks of existing heart failure. Therefore, if a person with rheumatic heart disease catches a cold, it is crucial to seek medical treatment early and go for a hospital examination. If it is a viral infection, antiviral treatment should be given, and for bacterial infections, medications to control and kill bacteria should be administered. Furthermore, if there are repeated fevers during the treatment process, physical methods to reduce fever can be used, such as applying a cold cloth or ice pack to the head when the temperature is below 38°C, along with medication therapy using ibuprofen. In short, it is essential to treat colds and fevers early in patients with rheumatic heart disease. (Medication should be used under the guidance of a physician.)