What (other than allergies) causes welts to appear in random places?

Thank you for correcting that. In my defense, I was told that it was EX and that it was caused by cholesterol by the dermatologist (who wasn’t “my” dermatologist, really…I only saw him once on specialist consult for that issue).

Have you changed your shower gel/soap recently? I get this if I switch to a different shower gel – not all shower gels, but certain (cheaper) brands seem to create these blotchy rashes. It took me years to work out the cause – I eventually worked it out by process of elimination, mainly when I realised the welts were appearing on bits of the body that I scrub most when I’m in the shower.

Changing washing powder can also cause the same problem.