1, children with congenital heart disease are prone to “chicken chest” of medical origin after surgery, that is, all or part of the sternum protrudes outward, which only affects the aesthetics, and will not affect the heart function. Parents can rest assured that the sternum of the child is both narrow and thin, coupled with a high proportion of organic components in the bone tissues, and the surgery needs to be sawed open the sternum, and in the early period of the postoperative period, only by the special stitches or fine steel wires are fixed, so the strength of the sternum is greatly reduced in the early postoperative period. Therefore, the strength of the sternum is greatly reduced in the early postoperative period, at this time, the heart beat and normal respiratory movement will be affected, and “chicken chest” is easy to appear, especially for children under 1 year old, the incidence is very high. Individual children may have “funnel chest” after the operation, which is very rare, but it will have a serious impact on young children, because parents can find that the sternum sinks inward when the child inhales, especially when he/she cries, and this sinking is more obvious, which will compress the heart and have an impact on the child’s cardiac function. After discharge from the hospital, the child can be observed for a while, because as the bone hardens with age, the sternal depression can be reduced in some cases, avoiding the need for surgical treatment.