Key Allergens

Allergy to onion is very rare. It is also rarely a cause of allergic contact dermatitis and urticaria.

Syndromes

There is no information on syndromes associated with onion allergy.

Cross Reactivity

Onion is in the Alliaceae plant family, other plants in this family are chives, leeks and garlic. If your allergy is severe these plants may also cause allergic reactions.