that’s probably you have to make the heat treatment on quite short time after the bite. still, subjectively it still helps afterwards. It starts to itch more for a minute and calms down after
don’t really have a theory in why this works then…

how long does the child’s treatment helps? does the itch stay away after it warms up again?
I already tried to cool down stings with cold packs, but usually the itch comes back rather quickly.

will read your link now, as I got some surprise free time on hand - sorry for the possible premature answer/questions

edit: read the abstract (I think, I can’t access now without an account/paying?), and I think my questions still stands, as they only seem to say the applying cold stills the itch. maybe I’m missing something because of not having the full article - will try scihub

edit2: got lucky on scihub :⁠-⁠)
ok, seems there is really something to it. but my subjective reactions were different. maybe time of application plays a role here as well. would be cool to know the physiology behind it