Foot itch/tingling

For about 4 years I have been bothered by episodes of severe foot itch followed by tenderness and tingling. The outbreaks usually take place when I am under emotional stress (both pleasant and unpleasant) and have become so debilitating that I can barely function normally during an episode. I have noticed recently that the itching has become more generalized (arms, torso) but not nearly so severe as the itching in my feet. Can you help me??