Jane7, I too desperately wanted my dd to avoid eczema, she had lovely skin, then one day at a bout 4 months old, her skin turned into dry spotty skin, and I knew it was eczema straight away (my dh suffered badly as a child). I felt crushed, upset, and angry. So disappointed for my dd that she had this horrid condition.
On the positive side, she is now 5yo and her skin is lovely.
When she was a baby I originally did what the doctor said with regard to creams and bathing. The more I read I came across a few things:
try swapping cows milk for goats milk. It's easier to digest and can help with eczema.
If you are not keen on chemicals for your baby, put oats in a cloth bag (or pillow case tied with string) in the bath for a soothing bath.
Washing powder: try surcare.
Avoid giving your youngster cheese. It makes eczema so itchy. If your ds ecazema becomes particularly itchy over time, then a good book to look into would be the "The allergy bible". It has a section on a regime for reducing the itch, its the low amine diet. Unfortunately amines are in loads of foods, but even following the "diet" you are not cutting out any food group. Real offenders are anything vinegary, grapes, anything processed. It's a long list, but when I did this for my dd, her eczema reduced in 5 days and she was much better. I would approach this regime with caution whilst your ds is at such a young age, but it is something to think about when he's older, and eating a varied full diet. I'm not sure I'd follow it at such a young age, but just reading it may be useful. Having said that, by not introducing processed food, that's a positive step for health anyway!
If I think of anything else, I'll add it to the list!
HTH.