After surgery for congenital heart disease, bulging of the incisional segment occurs in many children and is more common in infants and children with pulmonary hypertension. It occurs mainly because the surgical procedure disrupts the continuity of the sternum, and together with the fact that most children with congenital heart disease have an enlarged heart, significant augmentation of the sternum occurs within a few years after surgery. According to clinical observation, most of the children will gradually relieve the sternal bulge as their body and chest develop, the heart size returns to normal, the chest wall thickens, and the sternum bulges. By the adolescent stage, the growth and development of the anterior thoracic region is basically close to that of the same age. Some parents with precordial disease have described the effect of having the child sleep prone after surgery or using a rice bag to press on the sternal bulge. After cardiac surgery, the sternum is fixed with a wire, and in children with a thin chest wall or in patients who are thin, the wire can be retrieved. Occasionally, some wires break or the wire penetrates the skin, requiring the wire to be pulled out. However, this is a minor surgical operation and parents should not be overly concerned. For infants and young children, because the sternum is not fully ossified, the tension of the sutures that close the sternum after open-heart surgery can cause the sternum to bulge to varying degrees, which is common in postoperative patients, and the baby’s family need not worry too much. Under the guidance of the doctor, we can consider the use of chicken chest control device to flatten and fix the sternum to make it grow smooth and beautiful. Generally speaking, sternal augmentation will gradually return to normal with growth and development, but if it remains like this for a long time after surgery, you should follow up with the clinic in time.