Rash Remedies

I use ginger to prevent this horrific rash. I juice a pound of root into a couple dozen mini ice cubes and plop them into my teas, soups, sauces, stews, etc. I am curious that only the yellow ginger root works and not the brown ginger. Would appreciate feedback on the difference between the two types. I've had the rash for over ten years. Just discovered the ginger remedy over a year ago. I have appr. twenty pounds(pre-juice weight) of frozen ginger cubes in my freezer because I am such a strong believer in it's power to keep my horrific rash in check.