Studies have shown that the emollient in oatmeal has been found to be helpful to eczema sufferers. There are many products out there which are made from it. Here's one simple remedy shared by a mother from AP (asiaparents).
Instant oat x 250 g
Old nappy x 1pc
Hot water
Method
1. Put instant oat into the old nappy and tie into a pouch using rubber band
2. Put the whole pouch into a bowl of hot water, cook the oat for 15 min
3. squeeze the nappy in a bathtub to remove the starchy oat (that's what u want to get)
4. Bath your child in the water with starchy emollient, sometimes i will rub the nappy on my child's body too.
Hope that helps