I am starting to realise that anything that can help eczema at one point, can make it worse at another. It's all about a balance I think.
It's as if the skin broadcasts the state of the whole system and trying to find single causes has been fruitless for me. I think prevention if possible is the best.
My ds's outbreaks usually follow some extreme of temperature, illness, change of scene, upset, etc as if some invisible balance has been thrown off. It's a mysterious business!
Have you tried 'Hope's Relief"? I think it's good, hideously expensive but good. There seems to be a lot of natural creams that look good and cost a fortune!