Ectropion is a condition in which the lowermost rib extends beyond the outer edge of the body and occurs in babies between the ages of 3 months and 2 years. The baby’s rib cage is a kind of rickets, which is a common systemic disease in infancy. A baby’s ribs out of the causes of baby’s ribs out of the reasons may be congenital developmental abnormalities, mainly refers to simple rib development malformation. In addition, acquired factors such as lack of vitamin D and calcium, malnutrition and the influence of drugs and gastrointestinal diseases. Second, how to determine the baby rib ectropion Baby rib ectropion can generally be judged visually by the naked eye, such as let the child lie flat, observe the lowermost edge of the rib beyond the outer edge of the body, it is called rib ectropion. In addition, the initial manifestations of rib ectropion are mainly mental symptoms, such as restlessness, night terrors and excessive sweating, as well as skeletal changes such as square skull, dental caries and backward or sideways curvature of the spine. The chest manifests as lower edge exostosis, funnel chest, chicken chest, etc.; the extremities manifest as the appearance of bracelets, anklets, O-leg, X-leg, etc. Once the baby is found to have the above symptoms, he/she should seek medical attention promptly: 1. Physical examination: routine measurements, including height and weight, to check whether the child has clinical signs of rickets; 2. Laboratory tests: such as blood calcium, blood phosphorus, alkaline phosphatase, etc. If the results are abnormal, it indicates the presence of diseases that cause rib exostosis; 3. Skeletal X-ray examination: through skeletal X-ray examination, we can understand whether the degree of skeletal changes normal. Once the baby’s ribs are found to be exostosis, active treatment is required. The treatment methods are as follows: 1, drug therapy: calcium deficiency can be oral calcium carbonate D3, calcium zinc gluconate; 2, diet therapy: can strengthen the intake of milk, soy products and seafood to increase the calcium, vitamin D supplement; 3, exercise therapy: appropriate to increase outdoor activities, more sunshine to promote the absorption of calcium.