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Chemicals rarely cause true allergies.   Dr. James Thompson wrote about the difference between allergens and irritants in his blog. Allergic reactions are typically triggered by organic substances -- pollen, food, mold spores, dust mites, animal and cockroach dander and feathers, for example. Allergens can cause white blood cells to make IgE antibody. That is what makes them allergic trigger factors.   Synthetic chemicals, generally, do not stimulate IgE antibody production. Thus, they are not allergens, but irritants. Irritants also include smoke, odors, fumes and other chemicals. They irritate the inner surface of the nose, eyes, throat, or lung. There are a few chemicals involved with plastics and paints that may cause allergic sensitivity (TDI and TMA, specifically).   The chemicals and dyes you are exposed to at work may very well be causing your symptoms -- but they may not be allergic reactions.   If you don't wear safety goggless or a mask, you may want to try them to see if that helps your symptoms. Most importantly, tell your doctor just what you're exposed to and the symptoms you experience.