That's just weird. Allergy to gypsum. I've been told everyone is allergic to something though. So far I have not found anything I'm allergic to.
Back in 2001 when we did the 3500 sheet addition on the eagle county airport expansion project, 8 miles away from eagle is a town called gypsum, named after the gypsum mine there.
American gypsum has a big plant there, as you may have figured out. They would bring us 500-600 sheets at a time, hot off the presses, the sheets were still warm / hot, which was nice since it was winter time, and there was little to no heat in the addition part of the building yet. Handling the hot sheets, kept my fingers & hands nice and warm.