Seaecho, that sounds quite frustrating! TY for sharing your story.
I can only hope my assumption that this rash is topical, from getting plant sap on my skin, is correct. A further reaction could be possible. I've only gotten this rash 2-3 days after cutting into certain plants.
I would have to give up most of my house plants to eliminate this threat. As far as I know, I'm only at risk when I cut into them, exposing the sap inside, and only then if I get the sap on my skin and fail to wash it off within a few minutes. *Hopefully...!*
