Can eating wheat or glutin cause an itchy reaction? i have an chronic ear itch that seems to go away when i cut out flour from my diet. coincidence?

No: Allergic reactions can manifest in itching in different places. If you have noticed a correlation and decrease with no gluten intake then continue to eliminate it from your diet. For confirmation of allergy have lab tests done at your primary physician.

Wheat can cause itch: Gluten is a molecule found in wheat, barley, and rye. It is what gives bread it's chewy texture. Patients with celiac disease have immune reactions to gluten. Itchiness could be one symptom but not very common. Your pcp can draw a blood test to screen for celiac disease. A true wheat allergy, on the other hand can cause itchiness. This is best diagnosed by an allergist with skin testing.