Skin moisturizing probably works best - try a urea based lotion, it usually itches even more for about 15 minutes, then it gets better. Also applying pressure instead of scratching may help and wearing cotton gloves so that you don't damage your skin (especially at night). Otherwise if nothing helps you might have to resort to medication for a short while until things calm down.
The bottom line is - don't scratch, it only perpetuates the itch.
The bottom line is - don't scratch, it only perpetuates the itch.