What symptom may indicate severe envenomation from a Bark Scorpion sting?

Severe envenomation from a Bark Scorpion sting can lead to a variety of serious symptoms due to the potent neurotoxic effects of the venom. Central nervous system dysfunction is a critical manifestation of severe envenomation. This can include symptoms such as seizures, altered mental status, respiratory distress, and other neurological disturbances, which are indicative of the venom's impact on the nervous system.

In contrast, local swelling might occur with many types of stings and is not necessarily an indicator of severity. Nausea can be a common symptom with various envenomations, but by itself does not specifically indicate severe envenomation. Fever is also a symptom that could arise from infection or other medical issues but is not typically associated directly with scorpion sting severity. Understanding these differences is key in recognizing the severity of envenomations and the appropriate medical response required.