rash on me

Irene
Anyone know what this could be? I had something similar pop up in the hospital just on my arms right after I gave birth. We figured it to be a reaction to whatever they washed the babies blankets in. It went away then this popped up about 2 weeks ago. It's on my arms, legs, stomach and chest. It's super itchy! Doctors keep saying dermatitis and to use hydrocortisone cream. The cream helps temporarily but it's spreading. We haven't changed anything as far as detergent or soap so I'm at a loss as to what could be causing it