Scape sting with credit card or drivers licenses apply tobacco dip in can is best on sting and cover. tobacco will draw out poison and take benedril to slow swelling there was some thing else to do but i forget.
Things to get at store and put in truck.
Dip in can moist type
benadrill(very important workers or your self can be alleregc and can be fatal)
Also, this sounds completely totally nuts, but electric shock also seems to work as an anti-venom... as in instantly with instant pain relief. I was told the same thing and thought "that's nutzzzzz!!!" but found out by pure accident that it was true.
In fact, I'm pretty sure I was developing an alergy to yellow jacket stings, having never been bothered after multiple yearly stings. I was in bad shape with this one sting. After the shock there was fast improvement and since, I have been stung again and had a below average reaction.