An herbal book I have (got 3 new ones at the same time, so don't remember which advice was in which) said that plantain (the flat leafed "weed" in most yards in america, I had to do a google to find out what it looked like, didn't know the name of it) leaves are good for bug bites (& burns & something else (bruises maybe?). It said as long as you know the yard hasn't been treated w/ pesticides, to just pick a leaf, chew it up to make a "spit poltice" and then slap it on, supposed to draw out the poison I think . . . going on memory here.
Anyway, I filed that away in my brain as a quick easy way to deal w/ all kinds of "we're outside playing & got hurt" type things, since it's right there).