What does a child's hard bones mean?

Children's bones hard to explain what? Children's bones are particularly hard, is to explain the bone density, high calcium content, not calcium deficiency. If calcium deficiency, will show osteoporosis, generally do not need to worry too much, do not need to do special treatment, you can check some trace elements, if normal, you can strengthen physical exercise, enhance physical fitness. In addition, some imaging tests can be performed to see if the child's bone scale is closed and whether there is any abnormality in bone density, because if the epiphysis is closed prematurely, it will affect the development of height.