Due to the ionizing effect of X-rays, the human body is exposed to X-rays and cells are ionized, which affects cell activity and thus causes cell death, which can lead to radiation sickness in severe cases. A small amount of radiation can cause very slight damage to the human body, while more than a certain dose can cause serious damage to the human body. For example, if a pregnant woman in early pregnancy receives a large dose of radiation exposure, it may lead to serious consequences such as miscarriage, stillbirth or fetal malformation. Usually the damage caused by radiation from medical X-rays and other means is within a manageable range.