The position of a man’s right upper chest is roughly at the third rib. Since the nipple is flat against the fourth rib and the sternal angle is flat against the second rib in a normal man, the position of the right upper chest of a man is roughly at the third rib, and the eighth and ninth ribs are roughly at the lower edge of the rib arch in a normal man. Normal male ribs corresponding to the body surface markings are: sternal angle flat to the second rib, nipple flat to the fourth rib, subacromial flat to the sixth rib, and the lower edge of the rib arch flat to the eighth rib. In general, if you want to know the corresponding ribs on your body surface, you can make a rough guess according to the above correspondences. If you have a rib fracture or other injuries that cause chest pain, you can accurately describe the location of the pain, which will be helpful for further diagnosis and treatment.