There may be, as others have noted, a sugar connection. Have you noticed and increase in symptoms with consumption of alcohol? Try avoiding all sugars and alcohol and see if that helps. A little essential oil of myrrh will help alleviate the itching (it smells good too). Instead of clawing at your skin with your nails try putting a little granular table salt on the affected area and lightly rub that around. That can also mitigate symptoms.

After you have been off of sugars for a while you might try using agave nectar as a sweetener.

 i am interested in hearing if any of these suggestions worked for you.