This home remedy does not work for everyone. But some have tried and ginger root somehow provide some relief for eczema rash. You can try it for yourself. Next time whenever you have some rashes, try slicing a piece of ginger root and rub it on the area. It will burn or sting for a while. But most probably, you will feel some relief for the itchiness. You can rub it a few times with a fresh slice of ginger root if the itch continues. From my personal experience, the next morning, the rash will start scabbing up and after a few more days, it will peel off. Alternatively, you can use fresh cloves of garlic instead of ginger root. Try it and see if it works.