Soak in a bath tub of luke warm water with about a 1/2 to one cup of apples cider vinegar in it. Stay in the water as long as you can. (Hot water can increase the itch...although it will subside once your skin cools down, and it won't interfere with the overall effect of the remedy. You can do this several times a day if you have the time.
If you find this helps, you can also make a solution of vinegar and water and dab it on with a cotton ball during the day.
This has helped me with a number of itching problems. Maybe it will help yours. Douching with vinegar and water could help too. I know that helped me with vaginal yeast infections.