DANB Radiation Health and Safety (RHS) Exam 2025 – 400 Free Practice Questions to Pass the Test

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What is a common sign of overexposure to radiation?

Nausea and dizziness

Headaches

Erythema (reddening of the skin)

Erythema, commonly referred to as reddening of the skin, is a well-documented sign of radiation overexposure. This occurs because high doses of radiation can cause damage to the skin cells, leading to increased blood flow to the affected area as the body's response to injury. As a result, the skin becomes red, similar to what happens during sunburn.

In the context of radiation exposure, erythema typically appears after a significant level of ionizing radiation has been absorbed, indicating the presence of potential skin damage. It is often used in clinical settings to assess the severity of radiation exposure and its potential effects on the skin.

While nausea and dizziness, headaches, and fatigue and weakness may also be associated with radiation exposure or other conditions, erythma specifically relates to the direct impacts on the skin and is an essential clinical marker in the assessment of radiation injury.

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Fatigue and weakness

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