Which of the following scenarios would likely require a pesticide handler's immediate reporting of symptoms?

The requirement for immediate reporting of symptoms in pesticide handling is grounded in ensuring the safety and health of individuals exposed to potentially hazardous substances. Sudden rashes or skin irritation can indicate an acute reaction to a pesticide or chemical, which poses a risk not only to the individual suffering the symptoms but also to others who may be exposed. Immediate reporting allows for prompt medical evaluation and intervention, as well as the opportunity to assess and mitigate any ongoing exposure that may affect other workers or the environment.

In contrast, mild headaches or fatigue may not necessarily indicate an immediate health risk, as these symptoms can result from various factors, and some may not require urgent medical intervention. Droplets of pesticide on clothing could indicate a spill or exposure issue, but they do not in themselves signal an immediate health crisis requiring the same level of urgency as a sudden rash or skin irritation. Therefore, the clear and direct health implications of experiencing sudden rashes or skin irritation warrant immediate attention and reporting in the context of pesticide handling.