I suffer with really bad eczema on my hands , I work in a nursing home so I'm always wearing gloves and washing my hands which make the problem worse.
I find a few things trigger it for me , cold weather (right now I'm suffering with this cold snap) stress is another big one that will make me flare up , and someone else mentioned dairy products . I have a lot of allergies and I really do notice if I've overloaded on dairy. I dont drink cows milk anymore and have dairy free yogurts etc but I can't fully give up cheese.
I find aveno good , I take a tube with me everywhere I go . If I don't keep my hands properly moisturised then I get problems.
Always have some hydrocortisone if it's bad. Betnovate had helped me in the past.