What are the signs and symptoms of a shellfish allergy?

The signs and symptoms of a shellfish allergy are not particularly different to those of other food allergies. They include: hives on the skin, facial, tongue, and throat swelling, tingling in the lips, diarrhoea, nausea, vomiting, abdominal pain, dizziness, or wheezing. In some cases, a severe life threatening condition called anaphylaxis can develop if you are exposed to even tiny amounts of shellfish allergen. Signs and symptoms of anaphylaxis include a fast heart rate, diarrhoea, anxiety, difficulty in breathing, low blood pressure, or unconsciousness. Anaphylaxis needs urgent treatment with adrenaline (usually from an EpiPen), and is discussed in more detail in another article. Anaphylaxis happens more commonly with shellfish allergies than with other food allergies.

The signs and symptoms of a shellfish allergy can appear very quickly (often minutes) after you eat some shellfish, or may occur several hours after you eat shellfish.

Shellfish Allergy Guide Index:

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