Peeing on a jellyfish sting won't reduce the pain.

The life hack: "Friends" told us that peeing on a friend's (or your own) jellyfish sting can relieve the pain caused by the venom.

Why it's bogus: Urine can cause more damage to a sting than doing nothing, since it can aggravate the wound site and lead to the release of more venom. Use an oral analgesic instead.