I was breast feeding my son when his excema developed. I continued to breastfeed and did not start him on solids 'till 5 months. We tried a ton of different creams and bath oils all no good.
It was not 'till he was 12 months old and we tried to give him cows milk and he had an immediate reaction we realised that he has multiple food allergies. (He was tested and diagnosed by our GP and a private Allegist, with a blood test and then skin prick tests).
The allergist said that if I had consulted his initially his advice would have to me been to stop eating any dairy, eggs, tree nuts, peanuts ands shell fish whilst breast feeding.
My son now does not consumme any of the foods he is allergic to and we used a cream called "Diprobase". It's not a steroid cream, only an moisturiser. We have to order it in especially via Mannings or Watsons. Although they do sell small tubes in the Mannings in the Princes Building.
We also put "Oilatum" in his his bath to moisurise his skin and "Epsom Salts" which are supposed to soften the water and therefore not dry the skin out so much.
Hope this helps.