Right side rib depression may be caused by acute injury, vitamin D deficiency, scoliosis and other factors. 1. Acute injury: the right side of the rib area has suffered trauma, resulting in localized fractures, in the process of fracture healing there may be deformity, so that the rib shape changes, similar to the depression. 2. Lack of vitamin D: babies long time partiality and picky eating, resulting in the lack of vitamin D in the body, there will also be symptoms of rib depression, which will seriously affect the physical development. 3. Scoliosis: For example, idiopathic scoliosis or congenital scoliosis, one side of the rib cage is asymmetrical with the other side of the rib cage, which is manifested as the right side of the rib cage is sunken. If your baby’s right rib cage is sunken and obvious, it is recommended to consult a doctor for appropriate examination and treatment to avoid adverse effects.