Crayfish allergy is an allergic reaction to proteins found in crayfish, a type of shellfish. Similar to other shellfish allergies, it can range from mild to severe and can be potentially life-threatening in some cases. People with crayfish allergy may react not only to eating crayfish but also to inhaling steam from cooking crayfish....


What are symptoms of crayfish allergy?

  • Hives or skin rash
  • Itching or tingling in or around the mouth
  • Swelling of the lips, tongue, face, or throat
  • Gastrointestinal symptoms like nausea, vomiting, or diarrhea
  • Nasal congestion, wheezing, or difficulty breathing
  • Dizziness, lightheadedness, or fainting
  • Anaphylaxis in severe cases

What foods cross-react with crayfish allergy?

People with a crayfish allergy often have allergies to other types of shellfish. Cross-reactivity can occur with:

  • Shrimp, prawns, and lobster
  • Crabs and other crustaceans
  • In some cases, mollusks such as clams, mussels, and oysters

When should I consider getting a crayfish allergy test?

  • If you experience symptoms suggestive of an allergic reaction after consuming crayfish.
  • If you have a known allergy to other shellfish, as there’s a higher risk of cross-reactivity.
  • If you have experienced symptoms while cooking or being near cooking crayfish.
  • If you’re introducing shellfish into your or your child’s diet and there’s a family history of food allergies.

How do I reduce my crayfish allergy symptoms?

  • Strictly avoid crayfish and any foods that might contain crayfish as an ingredient.
  • Be cautious when dining out, especially at seafood restaurants, and inform the staff of your allergy.
  • Read food labels diligently to ensure they do not contain crayfish or other shellfish.
  • Be aware of cross-contamination in kitchens where shellfish is prepared.
  • Carry an epinephrine auto-injector if prescribed, especially if you’ve had a severe reaction in the past.
  • Consult with an allergist for a definitive diagnosis and personalized management plan.

Test(s) that measure/test for Crayfish

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