What is the best course of action for a diver who has been stung by a jellyfish?

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The best course of action for a diver who has been stung by a jellyfish is to apply vinegar. Vinegar is effective because it can neutralize the venom released by certain species of jellyfish, particularly those with stinging cells that have not yet discharged. This action can help prevent further envenomation by preventing additional nematocysts (the stinging cells) from firing, which can occur if the area is rinsed with freshwater or if it is rubbed.

In addition, vinegar can help to deactivate some of the toxins and alleviate the pain associated with the sting. It is important to note that while other methods, such as using a neutralizing agent or rinsing with cold water, may seem like reasonable alternatives, they do not address the underlying issue as effectively. Leaving the sting untreated would increase the risk of complications and prolonged pain from the venom.

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