Mitral and tricuspid regurgitation in children may have physiologic or pathologic causes. Mild regurgitation under physiologic conditions generally does not cause clinical symptoms and is observed clinically. 1. If the pressure difference between the two sides of the valve is not large, and there is no combination of other cardiac structural and functional abnormalities, treatment is generally not needed, and regular follow-up, observation, and review are sufficient. 2. In some children, with regular follow-up and observation, the degree of mitral and tricuspid regurgitation gradually aggravates, and moderate or severe regurgitation occurs with the progress of the disease. At this time, regurgitation causes more harm to the body, and it cannot be treated by medication, but requires timely surgical treatment. Therefore, the regurgitation of the valve needs to be evaluated according to the cause of the disease, the evolution of the disease, and the severity of the disease to determine the treatment plan, and should be evaluated under the guidance of a professional doctor.