Which of the following is a symptom that may not always indicate pesticide exposure?

Fatigue is a symptom that can be caused by many different factors beyond pesticide exposure. While it can be a reaction to toxins, it is also often linked to stress, lack of sleep, or other health issues not related to chemical exposure. This makes fatigue a less definitive indicator of pesticide exposure compared to the other symptoms listed.

Nausea, headaches, and skin rashes are more directly associated with pesticide exposure. Nausea and headaches can arise from the body's reaction to chemical irritants, while skin rashes may occur as a result of direct contact with pesticides. Understanding the range of symptoms and their potential causes is crucial for effectively diagnosing and responding to pesticide exposure cases.