Going off at a tangent - apologies - whilst on holiday on Sicily a number of years ago we were approached by a lovely Norwegian lady whose husband had been stung by a jelly fish. He was laid on a sun bed in agony. I’m guessing but it must have been the mother of all jelly fish!
I suggested, in jest, she pee on him… cue her dropping her bikini bottoms, and me shouting “whoa, whoa, whoa.”
I always keep Anthisan* in the medicine cupboard . Works for me but might not work for everybody.
*My daughter was bitten by a false widow spider that had come in to the house the other day. Made us realise the tube was about 5 years past it use by date.