I make a soap for my daughter and brother in law who have eczema. I use goats milk full strength for my liquids and a low percentage of coconut, but I always have the coconut in there. Coconut is drying and that helps weeping of skin, but percentage is key because you always need that conditioning factor. I'd say no more than 20% coconut. I put oatmeal in there as well at trace, but I'm talking very finely ground and I don't load it in, just about a level cup for a 5 or 6 lb batch. Honey is another ingredient I like to add that jibes well with the other ingredients. I never use fragrance oils as they are irritating to sensitive skin. I use pure organic lavender eo at about 4.5 oz for a 5 lb batch. And always, since eczema is related to allergies, make sure you know what they are allergic to such as nuts, you would never use an unrefined nut oil in soap for eczema, or if they are allergic to coconut,,,, but the consumer can always check your labels as well providing you have listed everything on the label. Also, tea tree mixed in with lavender is a nice addition, but I like lavender for just about everything related to skin issues... It heals burns and cuts and washes skin to boot. Good luck with your soap. I am thinking of using my calendula infused oil or try comfrey in there and do a test run with my bro in law; however, I always cp my recipes... I still think that a lot of the goodness stays in the cp soap recipes if you superfat because I did a jewelweed and pine tar soap. I infused the jewelweed in oo for about 6 months shaking and turning the bottle throughout the infusion period. I really believe its in my final bars because I got poison oak and everytime I start itching and wash, my arm stops itching instantly (the pine tar helps that too). Pine tar soap has been helpful as well for itchy skin and eczema.