Garlic is a well recognised cause of allergic contact dermatitis and urticaria. Patch testing using neat garlic can cause false-positive reactions because of diallyl disulfide which is found in the raw garlic bulb which acts as an irritant on the skin.
Diallyl disulfide is used as a garlic flavouring in food and garlic oil.
An allergy to garlic after ingestion is more commonly linked to Non-IgE allergy than a true IgE allergy. It is important if you think you are allergic to complete a food diary to ensure you are not eliminating large groups of food unnecessarily. There are tips on how to make a Food Diary here.
There is no information on syndromes associated with garlic allergy.
Garlic is in the Alliaceae plant family, other plants in this family are chives, leeks and onions. If your allergy is severe these plants may also cause allergic reactions.
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