A small amount of mitral regurgitation is not serious, although a small amount of mitral regurgitation is not serious, but it should be taken seriously. The most easily damaged valve in heart valve disease is the mitral valve, because the mitral valve anatomical site is located between the left atrium and the left ventricle, the left ventricle contraction mitral valve valve naturally closed, to prevent the blood in the left ventricle regurgitation into the left atrium. When the mitral valve is not fully closed, the left ventricle contracts and the blood in the left ventricle will flow back into the left atrium, increasing the burden on the left atrium and left ventricle over time. In the case of mild mitral regurgitation, the patient has no symptoms and most patients are unaware of it, and it is only detected by cardiac ultrasound. There is no special treatment for mild mitral regurgitation, so it is important not to catch a cold, to avoid straining, to pay attention to outpatient follow-up, to identify problems and to prevent valve damage from worsening.