Generally speaking, there is no harm to children when measuring bone age because the irradiation site is limited and the dose is small. Generally, the best age of children for bone age measurement is 3~7 years old, and the shooting site is usually chosen to be the foot, left wrist, during the shooting process, children are farther away from the source of irradiation, and at the same time, the unirradiated parts will be strictly protected, so the dose of radiation received is extremely low, and the effect on the child is basically negligible. Through the measurement of bone age, the growth and development of the child’s height can be initially clarified, and generally will not have a significant impact. However, if the bone age is measured frequently within a short period of time, it may lead to a decrease in physical fitness, induce leukemia and other blood system diseases or induce malignant tumors. It is generally recommended to measure once every 0.5~1 year. Therefore, parents do not need to worry too much about the bone age measurement will be for the child’s growth and development of obvious harm, but do not recommend frequent or long time to measure the bone age, according to the doctor’s guidance, to the regular hospital regular monitoring can be. Normally, you can actively supplement vitamin D and encourage your child to participate in sports to promote the growth and development of your child’s bones.