Restaurants function wasabi with sushi. This yummy herb is tough to locate, so resorts outside Japan utilize horseradish, mustard and food colours. These components can activates wasabi allergy symptoms in hypersensitive men and women.
Food colours and chemical compounds used in food preparation are not healthy for the human body. They frequently irritate immune system, which then releases IgE antibodies to find them. Next time should you ingest indistinguishable protein or chemical preservative, then antibodies indicates to release histamines.

Thus hypersensitive people will experience different allergic reactions after ingesting or touching wasabi. According to studies, wasabi receptors plays vital role in signaling brain about itching when exposed to irritants. 

Cultivating wasabi herb is extremely hard, that's it is costly and barely available. Actual wasabi glue consists of origin of Wasabia Japonica. Since it loses its taste within seconds, restaurant owners grate the stem following consumer order. In other scenarios, chef covers wasabi with rice or sushi so the taste is maintained.

So probably you will have no issue with this kind.

As stated previously, ingredients in imitation wasabi comprise horseradish, mustard, green and starch food coloring. If you are allergic to one or more one of these components, skin rashes and dry flakes can be experienced.

Fake wasabi may contain gluten, which can trigger allergic reaction in hypersensitive people.

Even ingesting little amount of wasabi may result in mild to severe allergic symptoms.

As soon as you see adverse symptoms, reach allergist for diagnosis. He will conduct necessary test like skin pr!*k test to determine the allergen. When the allergen is confirmed, you must make sure to stay away and avoid eating it.

One of the best ways to treat food allergy is to avoid that food irritant. Apart from that other foods and dishes, which may include wasabi or other ingredients must be prevented.

Massage with olive oil or coconut oil to relieve from itching and inflammation. These two natural remedies can give temporary relief. But, to treat wasabi allergy you must consult allergist.

Source: https://aderonkebamidele.com/wasabi-allergy-symptom-diagnosis/