I had eczema for almost 20 years and it actually got better when the crohn's got worse. My gasterenteralogist said they were not connected but I disagree. They are so similar. One is on the outside and one is on the inside. Very similar things going on with the tissue. For awhile I was having fevers everyday. That is when the eczema cleared up the most. Now the fevers are gone and the eczema is back a little on the hands.
Someday there will be more answers. They are only beginning to study these things.