@cb314 When you see a dermatologist they have hundreds of skin condions to treat. Some are more knowledgeable than others about eczema. There answer is to control the irritation with steroids, which are a temporary help for most. But that is a treatment which doesn't address the cause. So as I mentioned once you stop the treatment the rash or itching return. The majority of eczema cases concern Atopic Eczema which most are born with and suffer greatly even as babies. Atopic seems to be part of the individuals dna and they have this on and off for life. Look up the types of eczema and it becomes even more complicated.

Here's a very cynical view why I was not even offered the 5 Day Extended Path test for 10 years even living in a large city with good medical. It can 't simply be ignorance on their part because the allergic form of eczema is not a rare form and having it develop later in life is common but voidance based on testing results no longer requires their services. Also dermatologist's, although MD's are not specifically licensed by the patch test kit companies so they had no motivation to send you to a patch kit test licensed dermatologist and loose your business.
If shampoos and conditoners which are free of common allergen's don't help after a few months (it does take at least a month plus to start calming the scalp down and )discontinuing all other products like sprays or gels, consider your pillow or other contacts.