I was exactly the same.

I wasn't aware that you couldn't use the steriod cream and I did use it in the 1st trimester.

Is there anything in particular that sets it off?

I know with me it was stress etc. But I also had to use gloves when using any chemicals at all.

I also work in a hospital where I have to wash my hands often. What I ended up doing was focus on washing the inside of the hands and try and avoid the area where the dermatitis was.

I really feel for you.