I have been suffering from occurring Vasculitis in my hands for the past 5 or 6 years. I get it during the hottest summer months (December - February) and as soon as it becomes cooler it disappears until the summer. My hands itch terribly and it is driving me insane. I cannot sleep at night as the itching never stops. The insides of my hands are swollen and red and it looks as if blisters are forming under the skin. A biopsy was done a few years back and it was diagnosed as Vasculitis. I have tried everything! Cortisone tablets (Meticortin) and Cortisone creams - nothing helps! What causes it? A dermatologist once said it is something that I eat! What can I do?