Risk of food allergy or food sensitivity
Research shows that majority of IBS suffers have seasonal allergic rhinitis and food allergy might play roles in some people's IBS. Prevalence of food allergy is considerably higher among people with hay fever, asthma and eczema compared to people without these conditions. The research also reveals that following IgE allergy test over half of people within a certain category of IBS were primed to react to their suspected trigger food. Though using IgE test alone proves insufficient relation between the foods and the IBS, other forms of food allergy, known an delayed food allergy or food sensitivity, could still be a possible cause of irritable bowel syndrome in people with hay fever (pollen allergy), eczema and asthma.