What can be a symptom of acute radiation syndrome?

Acute radiation syndrome (ARS) is a serious illness that occurs when a person is exposed to a high dose of ionizing radiation in a short period. One of the most common and early symptoms associated with ARS is nausea and vomiting. This symptom typically manifests within a few hours after radiation exposure and can occur because high doses of radiation affect the cells of the gastrointestinal tract, leading to dysfunction and irritation.

Nausea and vomiting are important indicators of ARS because they can be among the first signs that appear following such exposure, often presenting alongside other symptoms like loss of appetite, fatigue, and headaches. However, while these other symptoms can occur, the characteristic onset of nausea and vomiting is more pronounced and is a critical part of the clinical diagnosis of ARS. Recognizing these symptoms promptly is essential for initiating appropriate medical intervention and management strategies for individuals who have been exposed to significant levels of radiation.