I should clarify here that there are two kinds of goop -- the kind in the applicator that I did put in last night and that didn't burn particularly and did relieve itching enough so that I was actually capable of sleeping, which, of the good. Then there's also a cream you're supposed to apply externally twice daily to relieve itching -- that's the one that burned and that I've replaced with yogurt as a daytime treatment.

Thanks for advice, in any event!