I came in here and thought it'd be full of dirty nonsense but it's quite interesting.. I used to get eczema badly when I was young and bathed all the time. Now I shower and the only areas I get eczema are those I put shower gel on. I never bother to lather up my legs or feet but do underarms, head and genitals - the only areas I get any... I don't on my legs or feet.. I might look into this..
As I said above, Simple shower gel, or whatever brand you can find which doesn't have colourants / perfume / whatever. It literally changed my skin. It's easily identifiable because it's always clear and in a clear bottle.