Tell him to make sure he has this weed growing near his hives:
http://en.wikipedia.org/wiki/Plantago_major
There are two different types (broad leaf and narrow leaf), they both work well.
I have known about this weed all my life, but one story that stands out:
We were at the lake, and a kid that was highly allergic was stung. They stuck him in the car for the 30 minute ride to the hospital, and before they left, my mom handed them plantain. By the time he got to the hospital, he no longer needed the shot. But I do believe they gave it to him out of precaution.
You chew it up a bit (or roll it between your fingers if it isn't clean) then put it as a poultice on the sting. Works on bees, wasps, mosquitoes, stinging nettle, etc.
I need to take a picture of my ghost plants and post it.
Some day...