Which is an early onset symptom of an irritant exposure?

The early onset symptom of irritant exposure is characterized by immediate reactions of the affected tissues. A burning sensation in the eyes is a classic response to irritants, which can include chemicals such as acids, ammonia, or other hazardous substances. These irritants cause inflammation and a sensation of pain or discomfort as the body's initial reaction to protect itself from potential damage.

In the context of irritant exposure, this symptom typically arises shortly after contact, triggering reflex actions such as tearing or squinting as the body attempts to wash away or otherwise respond to the irritant. Understanding the immediate symptoms helps responders quickly assess and manage exposures effectively to prevent more serious health impacts.

Other symptoms mentioned, such as diarrhea, convulsions, and fluid in the lungs, may indicate different types of exposures or conditions that develop over a longer period or as secondary effects of more severe chemical exposures, rather than immediate irritant responses.