August 10, 2022
  • August 10, 2022

What to know about an onion allergy

By on February 5, 2020 0 322 Views

When a person is allergic to onions, their immune system reacts as if the onions are a dangerous substance. The result is allergic symptoms that can be severe, such as vomiting, itching, swelling, and difficulty breathing.

As onions are a commonly used ingredient in food, they can be difficult to avoid, so it is important for people to be aware if they are allergic.

Onions are part of the allium family, a plant group that includes onions, garlic, leeks, scallions, chives, and shallots.

This article will explore the symptoms that nutritionists associate with an onion allergy, as well as how to diagnose and treat it.


If food comes into contact with onions, it may trigger an allergic reaction.

If a person is allergic to onions, symptoms can appear up to 2 hours after ingestion.

Symptoms of an onion allergy may include:

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