I know it's a cliche, but drinking loads of water really does help! It sounds like you're sensitive to one or more of the ingredients in your facial wash. If the spots have become sore and itchy, I'd ask a pharmacist for advice, they can give you something for contact dermatitis. I always use a soap- and perfume-free cleanser, like Simple facial wash gel and then use medicated products only where and when they're needed as they tend to strip all the natural oils out of your skin, and it overcompensates by producing even more. It's best to keep it simple!