Oral allergy syndrome is also known as pollen-food allergy syndrome or allergic rhinitis. This condition occurs when a person develops an allergic reaction after consuming fruits, vegetables, or nuts. It results in itching and swelling of the mouth, lips, and throat. This condition generally occurs in people who are allergic to pollen. Some of the synonyms for oral allergy syndrome include pollen fruit syndrome, birch-mugwort-celery-spice syndrome, and food-pollen syndrome. This condition is treatable and can be managed by avoiding the triggering foods, taking antihistamines, and using allergy shots. Seeking medical attention is necessary to prevent complications and properly manage symptoms.