I think we should all, after starting our next periods, keep a little journal, or notes about when this starts, and when it subsides, what aggrivates it, and what keeps
it at bay. I think stress, is a contributor, but not the root cause. I think it is possible to have very sensitive, fragile skin down there...I find the kind of t.p. I use is key too. Often when I have a "recurrance" i literally need to use washcloths to wipe.