Chicken breast is an osteochondrosis caused by calcium and vitamin D deficiency, which usually does not affect life. In addition to affecting the beauty of the body, severe chicken chest, will make the two sides of the sunken ribs to oppress the heart and lungs, causing some impact on respiratory and circulatory functions, prone to fatigue, and recurrent respiratory infections, poor exercise tolerance, the impact of serious people, it is necessary to do surgery. Usually half a month after the birth of the baby should be supplemented with cod liver oil to prevent rickets. It is recommended to usually do more, physical exercise, such as chest expansion exercises, push-ups, etc.