Oral allergy syndrome (OAS) is a well-recognized but little known condition. It is characterized by a burning sensation or mouth pain and swelling when you eat specific foods that cross react to pollens to which you are allergic. Interestingly, the specific foods causing this reaction are well established to cross react with certain trees, grass, or weed pollens, house dust mite or latex. There are common groups of foods that cluster with certain nasal allergies. For example, ragweed allergy commonly causes an oral or gut reaction after eating melons or bananas but usually not other foods. Birch tree pollen is commonly associated with reactions to numerous foods as is latex allergy. The explanation for these reactions include similarities in protein structures as well as some chemicals in the foods.

Though this reaction is well documented in the allergy literature it is not commonly recognized or diagnosed by most doctors including some allergy specialists and many stomach specialists. Various allergy web sites include lists of the common foods associated with certain pollens, dust mite or latex. However, a comprehensive list that is easy to read or interpret can be difficult to find. Also, the names of some pollens or the common links between a group of pollens and a group of foods can be confusing.

Continue reading “Pollen Allergy and Food Sensitivity: The Oral Allergy Syndrome and Food Intolerance”