For two years I've had circular dry patches on both of my knees.  In fact, the patches appear in the same position on both. A dermo advised that it's not eczema as there's no itch.  I'm gluten and dairy free and take EPO, hemp and fish oil (alongside other vitamins and supplements) on a daily basis.  It was once mentioned that perhaps millet could be the cause.  Any thoughts would be appreciated.