I just wanted to mention too that I developed eczema on my hands, and although it "looked" like work related, because it started when I began a new job, as the dermatologist insisted too, it didn't clear when I was off work for a two week break. I stopped seeing the dermatologist, as he was IMO closed minded and wasn't helping except to perscribe useless hydrocortisone cream repeatedly, as well as dismissing my connection of eczema being related to some teeth shifting, so I bore it because my gut feeling didn't tie in with what my dentist as well as other so called professionals said.
Diet definitely made it go from horrible chronic to manageable however, long story short, it turned out I had severe bone loss in a couple of teeth due to bacteria for God knows how long. (I'm positive it was actually trauma cause by biting on a metal fork but of course the Gods in white poo poo my theory) Anyways, after this was discovered finally and by luck, the peridontist did deep cleanings and I went on antibiotics for five days and my eczema was gone by the 6th day. I didn't want to but I knew after boneloss was revealed and bacteria situation explained that it was likely connected.
I seem to have a vulnerable area in my hands now, probably because my hands are often exposed or sweating in gloves. So they ARE sensitive to conditions and diet does play a role for sure but how they are now and how they were before deep cleaning and antibiotics is uncomparable.. (Even the peridontist dismissed my assertion as nonsense but I could tell it upset him for some bizarre reason) So although a long shot for any eczema sufferers, if you have a gut feeling or have experienced other seemingly unconnected symptoms, bacterial problems might be at play. I loaded up on good probiotics too.