Radiation injuries occur when living tissue is damaged by exposure to high levels of ionizing radiation. This type of radiation can come from sources like nuclear accidents, radiation therapy, or radiological weapons. The severity of the injury depends on the dose, duration of exposure, and the part of the body affected. Symptoms of radiation injuries can vary widely, ranging from skin burns and hair loss to more severe effects like acute radiation syndrome (ARS). ARS can cause nausea, vomiting, and damage to internal organs. Treatment often involves supportive care and managing symptoms to help the body recover.