“You should pee on a jellyfish sting.”

The idea that urinating on a jellyfish sting will alleviate the pain is a persistent misconception, often perpetuated by popular culture and anecdotal remedies. This myth likely gained traction due to the belief that compounds found in urine, such as ammonia and urea, could neutralize the venom or deactivate the stinging cells. Some might also mistakenly associate urine with acidic solutions like vinegar, which *can* be effective for certain jellyfish stings, assuming a similar beneficial effect.

However, scientific evidence consistently busts this notion. Urine is primarily water, and its chemical composition varies widely, meaning there isn't a consistent or sufficient concentration of helpful compounds to counteract jellyfish venom. In fact, applying urine can be detrimental. The freshwater content and variable pH of urine can trigger undischarged nematocysts, the tiny stinging cells embedded in the skin, to release even more venom, intensifying the pain and worsening the sting. The pressure from the urine stream itself can also agitate these cells, leading to further envenomation.

People commonly cling to this myth because, in a painful and unexpected situation like a jellyfish sting, there's a natural human desire for an immediate and accessible solution. When clear, evidence-based first aid isn't widely known or readily available, people often resort to what they've heard or seen in media. Unfortunately, in this case, the readily available "solution" only adds to the discomfort rather than providing relief.

For most jellyfish stings, the recommended first aid involves carefully rinsing the affected area with vinegar (for certain species, like box jellyfish) or seawater to help deactivate remaining stinging cells, and then immersing the sting in hot water (around 110-113°F or 43-45°C) for 20-45 minutes. This heat helps to denature the venom and alleviate pain.