Different things work for different people. I have someone at my work that has eczema that doesn't respond to much at all (including dermatologist products) and have met others that various things have worked for it. What is seeming to work for her is a B-Vitamin complex... the B2 and B3 are the most important in these. I believe she went with a liquid to apply directly to the area - I would suggest oral form. (With all vitamins it is important to consume them with food). B-vitamins will need to be taken everyday if you are not getting enough through diet since - unlike A, D, E, K - your body cannot make the B or C vitamins.
Other things that might help the area:
Vitamin D3
Sunlight
Find products that are making it worse and discontinue/find alternatives for them (lotions, soaps, cleaning products, certain foods, medications) - many cheap lotions - even those for eczema can make it worse. If you're looking for a moisturizer look into using the fat-soluble vitamins A,D,E,K which is what does most of the moisturizing in moisturizers and combine that (ie: cut open liquid pills or use liquid types - of good quality) with a type of oil that doesn't irritate your skin (Good Examples: avacado, olive, Apricot, hemp seed, borage, coconut, sweet almond, jojaba, ) - look for cold pressed types.
With any products - if the eczema is on both hands, I highly suggest her treating one - one way and the other another to see which products work best for the area.