Hello I also suffer PTSD because of HS flares.
As wrote, I used to sit a certain way at work just in case I had a flare in that area and I didn't want it to burst as I was working...and for the record, it has happened to me a few times already while I was at work. (It felt like a living nightmare)
Secondly, a lot of times I would maybe have a seat for only 30mins for my lunch break during an 8 to sometimes 16hr shift. Those days were HORRIBLE.
Sometimes I still can't believe I went through those dark days. Another thing I would do was wear a pair of basketball shorts under my work pants just in case of a leaky flare. So much PTSD from this awful illness.