One of the most common problems associated with fibromyalgia (FMS) and chronic fatigue syndrome (CFS) is food sensitivity. Since both conditions involve central sensitization, medical experts believe that patients can develop sensitivities to certain foods. These food sensitivities may be mild but enough to further aggravate existing symptoms. Food sensitivity should not be confused with food allergy.
The best way to know if you are sensitive to any food is to follow the elimination diet. It is not an easy diet to follow. However, the diet plan is short compared to most diets. To start with, remove the broad categories of foods that are most likely causing the problem. After a while, slowly re-introduce these foods into your system and see how you feel about them.
I know that I cannot consume artificial sweeteners as well as MSG. I have known about the MSG for over 30 years. I learned about artificial sweeteners about 10 years ago. Eliminating gluten did not change my pain level at all. I tried for 6 months and no improvement. When I reintroduced, my pain level did not increase.