Have you tried food allergy testing?? I know it sounds out there, but I found out the CAUSE of my sons eczema (and some behavior problems) were his allergies/intolerance to gluten (wheat), Casein (Dairy), Soy, potatoes, egg, and peanuts. Once we got gluten and casein out of his diet, it almost completely cleared up! We recently discovered more, so we have started to eliminate those, and his skin looks wonderful! We found out Soy was triggering his behavior problems, and now he is a whole new kid....
Keep in mind that too much steroid creame can also make his sterile in the future, harm his growth, and how his muscles develop. I stopped using it as soon as I found that out.
I wish you all the luck in the world, and email me if you have any questons...:)