Which symptom is NOT typically associated with acute radiation syndrome?

Acute radiation syndrome (ARS) results from high doses of ionizing radiation in a short period and can lead to a range of symptoms that typically manifest within hours to days after exposure. Nausea, fatigue, and vomiting are common symptoms associated with ARS due to the impact of radiation on rapidly dividing cells, particularly those in the gastrointestinal tract and bone marrow.

Nausea and vomiting often occur soon after exposure, while fatigue can develop as the body's systems begin to struggle under the effects of radiation damage. Skin rashes, on the other hand, are not a standard early symptom of ARS and are more associated with other conditions or types of radiation injury, such as localized exposure leading to skin damage or burns. Therefore, the skin rash is distinctively less common in the context of acute radiation syndrome compared to the initial symptoms like nausea, fatigue, and vomiting.