Itching can be a symptom of Fibro. I have suffered most of my life w/ skin allergies. As a baby my mother had to use certain soaps for me and my clothes. I had prob w/ starch in my school uniforms, that was ALL over my body, had to apply the med one dot at a time all over head to toes. As a teen I started w/ dermatitis, hands, arms, face. about 12 yrs. ago I worked in a 'closed office' everyone but me smoked and no ventilation. My skin was going nuts, I would scratch till I bled. I also find dairy food causes me to itch, I haven't had milk in about 15 yrs. That caused a lot of prob w/ skin and bowels. I can only use certain soaps and shampoos and detergent/softener or I will still itch. Did you use anything new recently? Soaps or foods? I hope it stops soon, I know how that can drive you crazy. Good luck.
God bless. Alice.