Whether chest X-ray is harmful or not needs to be decided according to the number of times the patient does chest X-ray, the specific analysis is as follows: Chest X-ray is the use of X-rays to penetrate the human body to form a means of image examination, do chest X-ray will produce radiation, and radiation will have an impact on the human body, seriously increase the chance of cancer, each time to do chest X-ray radiation dose produced by 1 radiation unit, therefore, a person can do chest X-ray 3 times a year is generally safe. If occasionally do a chest x-ray is generally not harmful to people, if more than 3 times a year, there may be some harm to people, it is recommended that if you need to do chest x-ray and other tests should go to a regular hospital, in accordance with the doctor’s recommendations for examination.