Mild tricuspid regurgitation shall refer to mild tricuspid valve closure insufficiency. This disease is mainly caused by chronic cardiovascular diseases, infectious cardiac lesions, congenital defects, etc. The specific etiology of the disease varies from person to person. 1. Chronic cardiovascular diseases: such as primary pulmonary hypertension, dilated cardiomyopathy, etc., can cause right ventricular or tricuspid annulus expansion, thus secondary tricuspid valve closure insufficiency. 2. Infectious heart disease: such as infective endocarditis, rheumatic heart disease, etc., can cause tricuspid valve valve damage, and then tricuspid valve closure insufficiency. 3. Congenital defects: such as congenital Ebstein’s anomaly (tricuspid valve downward deformity), Marfan syndrome, etc., all of which may present with tricuspid valve closure insufficiency. 4. Trauma or medical trauma: such as chest trauma, postoperative complications of pacemaker surgery, etc., can lead to tricuspid valve insufficiency. However, it should be noted that only some of the causes of mild tricuspid insufficiency are listed above, and other causes can be seen clinically, and the causative factors of specific patients may have large individual differences. Therefore, mild tricuspid insufficiency must be determined under the guidance of a physician according to the actual situation of the individual to determine the cause of the disease, and should not be blindly judged and disposed of on their own, in order to avoid adverse consequences.