The intercostal groove is located on the inner surface of the rib cage near the lower edge. The costal groove is made up of the ribs and the costal cartilage, which is the gap between the two ribs. The groove is located near the lower edge of the inner surface of the ribs, and the intercostal nerves and posterior intercostal blood vessels pass along the groove, which reinforces most of the side walls of the spine and protects the internal organs. Therefore, the costal groove, as a component of the rib cage, has a protective effect on the organs of the human thoracic cavity. If the ribs are underdeveloped, it can lead to thoracic deformities such as pectus excavatum and pectus excavatum, which need to be treated. If there is any discomfort in the ribcage, it is recommended to consult a doctor in time, complete the relevant examinations, and identify the cause of the disease and carry out targeted treatment under the guidance of a professional doctor.