Chest X-rays for babies are generally not obviously harmful; if frequent chest X-rays are taken within a short period of time, or if protective measures are not taken properly when taking chest X-rays, etc., harm may occur, but there is no exact time of manifestation. Chest X-ray produces a very small dose of radiation, the harm to the human body is negligible. However, if a short period of time to the baby frequently take chest X-ray, or take chest X-ray when the protective measures are not done, may bring some harm to the baby’s health, but there is no exact time to reveal the definition. Chest radiographs for babies should not be taken too frequently, at most 1-2 times a year. If you need to take a chest X-ray for your baby, the doctor will take good protective measures, and the dose of radiation during the chest X-ray is within the safe range, so a short exposure will not be too harmful to your baby’s body. If your baby needs more than one chest X-ray because of a medical condition, you don’t need to worry too much. Based on health considerations, the doctor will determine whether to take a chest X-ray for younger babies based on their condition, and will not let the baby take a chest X-ray if it is not necessary. Therefore, whether to take a chest X-ray or not should be based on the doctor’s recommendation.