The mitral valve surgery generally uses absorbable threads, the threads exposed on the surface of the body can fall off on their own, if they have not fallen off for a long time you need to consult a doctor in time to find a professional doctor to remove them, and do not dial out by yourself to avoid infection. After mitral valve surgery, the threads exposed on the surface of the body are generally absorbable threads, which will usually fall off automatically after a period of time. It may be due to the fibrosis of the wound that causes the absorbable threads to adhere and cannot fall off by itself, which needs to be removed after local disinfection in time. After the removal of the wound need to maintain local hygiene, regular disinfection, do not touch water. Removal of the thread should be completed by a professional physician operation, can not be self-treatment of the thread to avoid complications such as infection. After mitral valve surgery need to strengthen the care, the emergence of uncomfortable symptoms need to consult a doctor in a timely manner, can not be blindly dealt with, so as not to cause adverse consequences.