A child’s X-ray will not have much effect on the body. X-ray has a certain degree of radiation, the development of the technology so far, has been very mature, the radiation dose is very small, although the radiation has a biological effect, will cause damage to human cells, but the body’s self-repair ability will soon metabolize the damaged cells, so the small children to take an X-ray on the body does not have a great impact. Because the body organs of small children are not yet mature, so we should minimize non-essential x-ray examination, often large doses of exposure to radiation produced by X-ray can lead to radioactive damage, health hazards. At the same time, attention should be paid to the use of lead clothing to cover sensitive parts and organs, such as genitals, to avoid unnecessary damage.