The thing about allergies of all kinds is that everyone reacts to them differently. Still, some symptoms are simply telltale signs that an allergy exists. Feeling dizzy, nauseous, or even vomiting are all definitive warning signs that an allergy is present. As it relates to dizziness however, a study published in Laryngoscope recently connected wheat to a condition that can trigger dizziness episodes. The research team found that just over 56 percent of the participants in the study that suffered from Meniere’s disease, also had a sensitivity to gluten.