The right rib edge of the heart socket is painful, and the right costochondritis may occur. The connection between the sternum and the ribs is costal cartilage, which is easily stimulated by trauma, immunity and other factors to cause inflammation, and costochondritis. The costal cartilage inflammation will be manifested as the pain in the costal cartilage, especially in the chest expansion exercise, the pain will be aggravated, which is easily misdiagnosed as angina pectoris caused by heart disease clinically. It is necessary to make a clear diagnosis through physical examination, electrocardiogram and other examinations.