It takes about a week for the radiation from an X-ray to disappear. Each person has a different physical condition and a different metabolic rate, so the disappearance time varies somewhat. After the X-ray test will generally have a smaller radiation, through a period of time will be gradually metabolized, the time is about a week or so, but some patients may need a month or so to completely disappear, the specific time can not be judged, there are long and short. If X-ray test is only carried out occasionally, it generally does not have a greater impact on the patient’s body, and it is best not to carry out X-ray test for many times, so as not to lead to too much radiation, which will cause irritation to the patient’s body. If you find any abnormal reaction after X-ray test, you need to consult a doctor in time for examination and treatment.