Fibro, detoxing and Hives

Ok - So I have had 2 different outbreaks of hives in the last 2 months. Originally, I attributed it to ingesting too much barley grass, mixed with cell food... Has anyone else had any experience with Barley grass, cell food and hives? This is driving me nuts. The first time I got them, I thought a spider nest had hatched, now this time, I know what it is, but not too happy they are breaking out on my face!!! Any insight would be greatly appreciated. Love, Karen