Skin allergies?

I've had a strange skin allergy for about a year. All of a sudden it pooped up outta nowhere. I thought it was maybe due to stress but I don't think it is since I'm not stressed anymore and it's still there. It comes up in wierd bumps. I thought it was maybe eczema...can it just pop up outta nowhere? I've tried every anti itch lotion known to man, and the stuff the dermatologist gave me didn't work. Any suggestions? Hypnosis? Acupuncture?