Oral Allergy Syndrome (OAS) is a condition most allergy sufferers are not aware of, yet it is present in up to 70% of people with pollen allergies. OAS is caused by cross-reactivity between proteins in fresh fruits and vegetables and pollens.
more about Oral Allergic Syndrome To read more http://www.calgaryallergy.ca/Articles/English/Oral_Food_Allergy.htm
Oral allergy syndrome or OAS is a type of food allergy classified by a cluster of allergic reactions in the mouth in response to eating certain (usually fresh) fruits, nuts, and vegetables that typically develops in adult hay fever sufferers. The most common symptoms is an itching or burning sensation in the lips, mouth, ear canal.
