The function of the pulmonary valve is to close the passage between the heart and the pulmonary artery when the heart is diastolic and engorged, so that the blood from the heart that hits the lungs does not reflux. Inadequate closure causes blood to return in the pulmonary arteries and increases the burden on the heart. Heart valve disease is caused by functional or structural abnormalities of single or multiple valve structures (including leaflets, annulus, tendons, or papillary muscles) due to inflammation, mucinous degeneration, degenerative changes, congenital malformations, ischemic necrosis, or trauma, resulting in stenosis and/or incomplete closure of a valve. Severe dilatation of the ventricle and the heel of the main and pulmonary arteries may also produce relative insufficiency of the corresponding atrioventricular and semilunar valves. The mitral valve is most frequently involved, followed by the aortic valve. Is treatment required for mild pulmonary valve insufficiency? The function of the pulmonary valve is to close the passage between the heart and the pulmonary artery when the heart is diastolic and engorged, so that blood from the heart to the lungs does not flow back. Inadequate closure causes blood to flow back into the pulmonary arteries and increases the burden on the heart. Mild pulmonary valve insufficiency, the impact on the body is not significant, usually pay attention to not too strenuous on the line, pay attention to the prevention of colds but must pay attention to regular checkups. Avoid diseases and symptoms that increase pulmonary vascular pressure.