The baby’s side of the rib cage may have several causes: 1, congenital dysplasia, if the baby was born with the symptoms of rib cage exostosis, congenital dysplasia resulting in rib development deformity, no treatment, to be feasible after the baby grows up surgical correction. 2, rickets, early symptoms will have rib cage exostosis, rickets is mainly calcium and vitamin D deficiency, it is recommended to go to the regular hospital to improve the relevant examination, to be assessed by the doctor rib cage exostosis and the severity of the cause. The reason and severity of the disease can be treated with calcium and vitamin D. 3, external forces, if the clothing pants are too tight, long-term compression, squeezing the abdomen chest and ribs can cause rib ectropion, you need to wear loose, suitable clothing, not too big, too small clothing. Need to pay more attention to rest, pay more attention to calcium and vitamin D, pay attention to protect the rib cage, avoid external impact.