We have a worker that was suffering painfully from them this summer, and I was looking through the H. forum to see what might help him. I came across some posts about an herbal product called Calmovil, and ordered it for him. He said it made THE difference, huge difference. He was driving tractors and riding horses at the time :( oww. But, he also said they got worse when he was more stressed out and uptight about something.