My Dr. said a similar thing about our daughter's eczema... BUT she didn't look at it carefully because eczema is easy to spot! Also, my Dr. said that if the heavy moisturizers didn't work then we should use hydrocortisone. We used it (twice a day for about three days), and it cleared quickly. The very good thing about it was how quickly it healed (I didn't have to worry about her having too much cortisone!!). WAY better than all the suffering with the itchy-ness. she still doesn't have it. A friend of mine uses hydrocortisone for his eczema, and it works very well for him also.
That was winter. For a lot of people, eczema is a seasonal thing. My daughter got it when her skin was really dry (cold weather), but others can get it when their skin is sweaty- OR all year round just because they are prone to it (usually family history)- OR it is a response to an allergy. If you know the "cause", it can be more preventable in the future.
Good luck!
I just re-read your request... I didn't give you an answer that exactly answered your concern...
If you HAVE used hydrocortisone (by itself- also what you can do is cover it with a bandage so it doesn't "rub-off") and it ISN'T better, then it could be linked to a food allergy, a reaction to the laundry detergent you are using or the soap you use when you bathe your daughter. Think about the food thing and see if it is linked... ALSO, switch (if you don't have these already) to hypo-allergenic soaps and laundry detergents. If NO change then see a dermatologist.