Rheumatic heart disease is a heart valve disease caused by cold and wet environmental factors and bacterial infections. 1. Environmental factors: Rheumatic heart disease occurs in winter, spring and rainy season, cold and wet environment is an important cause of rheumatic heart disease. 2. Bacterial infections: Rheumatic heart disease is a heart disease of varying severity caused by recurrent episodes of rheumatic fever involving the heart valves. Rheumatic fever is caused by a type of group A group B hemolytic streptococcus bacteria in the throat after infection of the human body, resulting in recurrent episodes of a systemic connective tissue inflammation. If the body has uncomfortable symptoms, it is recommended to go to the regular hospital to find a professional doctor and standardized treatment, so as not to delay the condition.