What symptom is commonly associated with oral allergy syndrome?

Oral allergy syndrome is a condition that occurs when the immune system reacts to certain proteins in fruits, vegetables, and nuts, leading to localized allergic reactions in the mouth and throat. One of the hallmark symptoms of this syndrome is swelling of the lips and throat, which may cause discomfort or difficulty swallowing. This swelling is a direct response to the allergenic proteins that a person with oral allergy syndrome is sensitive to, often manifesting shortly after consuming the offending foods.

Other options, while potentially problematic in different medical scenarios, do not align with the typical symptoms experienced in oral allergy syndrome. Headaches and dizziness can occur due to various factors, such as stress or dehydration, but they are not specific indicators of this particular allergic reaction. Constipation, on the other hand, pertains to gastrointestinal issues that are unrelated to the immediate allergic response seen in oral allergy syndrome. Understanding these specific symptoms helps reinforce awareness of how food allergies can manifest in the body, particularly in vulnerable individuals.