I have excema and seborrheic dermatitis, which commonly causes problems behind the ears and on the scalp. If your DGD has sore ears, she may have the same thing.
I use Aveeno shampoo and conditioner. Other brands of shampoo aggravate my skin.
Aveeno cream is good as an all over moisturiser, as is Nivea. I get Epimax cream on prescription, though you can buy it otc. I put it on pre shower as well as after and just use a little unperfumed shower cream or soap. Shower gel is very drying.
Everyone's skin is different and I am allergic to some things that help a lot of people, such as Sudocreme.