Infant calcium deficiency, pay attention to the following points: 1, give supplemental calcium and vitamin D pills, calcium recommended to use calcium carbonate granules, higher absorption rate, easy for the baby to accept, in the morning and evening to take better results. 2, more outdoor activities in the sun, because sun exposure to the skin can be directly converted into vitamin D, conducive to the absorption of calcium and physical development. 3, reasonable diet, at 6 months of age if the baby has the desire to eat If the baby has been combined with rib exostosis, chicken chest deformity and other skeletal changes, let the baby crawl more, so that the thorax is expanded, to improve the skeletal deformity.