Acute Radiation Syndrome (ARS) is a serious health condition that occurs after exposure to high doses of ionizing radiation in a short period. Symptoms can appear within hours or days and may include nausea, vomiting, fatigue, and skin burns. The severity of ARS depends on the radiation dose received and the duration of exposure. ARS affects various body systems, particularly the bone marrow, which is crucial for producing blood cells. This can lead to complications such as infections, bleeding, and anemia. Treatment focuses on managing symptoms and preventing infections, but severe cases can be life-threatening.