External irradiation is the process of exposure to external factors, such as solar radiation, radiation, electromagnetic fields and others, on the human body. This process can cause various negative health effects such as cancer, DNA damage, mutations, weakened immunity, and also contribute to the development of various diseases. It is important to understand that external radiation can be dangerous, especially for people working in hazardous industries or living in radiation zones. Therefore, it is important to take precautions and avoid contact with sources of external radiation.