Do you know if there are any classically trained homeopaths in your area? if so, give one a try. Like you I tried everything, but my scalp kept getting worse to the point I was loosing my hair. One month after trying a few doses of a homeopathic remedy, my scalp stopped itching and flaking, and my hair is growing back. But, the remedy is specific to the person, so there isn't a remedy specific to "scalp" eczema... someone needs to take a good hour or so to interview you to determine which remedy might work. but its worth it, if it works the problem won't come back.