Had that happen in a wilderness area once..I was advised by a Search
and Rescue friend with whom I was riding to get to the nearest water
and smother the stings with mud and let it dry on my skin. By the time I
got home, there was little if any evidence of the bites and no
pain, swelling or itching...
Would like to second this. Reading electric meters years ago I was
stung seven times by a wasp on one leg. The rancher lady was home, brought
me in and mixed mud from the yard dirt to put on them. Said she did it for
her grandkids all the time. Soothed pain and itching immediately, swelling
gone by evening. Next day had seven little red dots, no itch.