one of the problems with eczema
is that theres not enough moisture retained in the skin and there by leading to roughness,drying and cracked issues.
the best remedy-applu a moisturiser..
and the best way is to apply it the right way.you must haveen provided and prescribed with medicated moisturisers.but the right way of applying them really makes a lot of difference.
you should ideally apply it while you are still wet from the bath.as this kind of makes a shield and traps the moisture.
hope it helps.
do consult your dermatologist