I make a cream for eczema that might help her. It does contain e/o's though. I can send you some if you like. It's a whipped butter with no junk. A mix of butters like Kokum and Illipe and Mango, a small amount of beeswax and many oils like, Tamanu, Pumpkin seed, infused Jojoba with chamomile, calendula and helichrysum, Rosehip, Babassu, Meadowfoam, Unrefined Avocado, Baobab and essential oils of Lavender, Geranium and Himalayan Cedarwood. I have a super mild goat soap with no e/o's or fragrances, superfatted with Pumpkin Seed oil and Seabuckthorn, she might like also. LMK and I'll send you some.
If you'd just like to make something yourself, balance a butter like Kokum (it's awesome!) with a little beeswax and a few of the oils mentioned above and you'll get a lovely product. Melt the butter and wax, then add the oils and mix over an ice bath to temper. When it's chilled, you can whip it with a balloon whisk so it spreads easily. If you decide to add e/os, do so after you get the consistency right. If you have to reheat, you won't damage them then.
I have no problem sending you some though. Just message me.
Dead Sea Salt baths are also great for irritated skin but she should check first that they'd be safe for her.