Hi J.,
I personally have had eczema my whole life and now my 12 month old son does too. It can be very frustrating so good luck to you with everything. My experience has been that most doctors will just prescribe topical corticosteroids to relieve the rashes. These work, but over long periods of time they can affect the elasticity of skin (I have facial eczema and with hydrocortisone use I have a lot of early wrinkles now). I believe that most of eczema is due to a combination of a genetically inherited tendency for dry, sensitive skin and allergies to the environment or to food. Lotions help with the dryness and creams help to stop the allergic reaction.
I was devastated when I realized my son also had eczema but I have learned to control it with a combination of diet and natural creams. Although I can't test him for food allergies yet, his eczema got significantly better after I eliminated dairy and soy from his diet. For creams, my friend recommended California Baby Calendula Cream (available at Target, Whole Foods, online) and using a really mild laundry detergent (Biokleen). Even after only one day, his rashy spots got sooo much better!
Diagnosing food allergies is really hard. I went to a Chinese Doctor in LA who can diagnose allergies to relieve asthma and eczema, and that helped alot.
Also, for more information you can check out: www.solveeczema.org (This site links eczema to a commonly used detergent called SLS which is in almost everything.) My friend with even worse eczema said eliminating all SLS products in her house completely changed everything.
Anyways, I don't mean to write too much. You can always message me if you have any other questions.
Good luck!! E.