Shellfish Allergy

This food allergy is an immune system response linked to shellfish. It happens when your immune system treats harmless shellfish proteins as if they're a danger to your body. Shellfish include crustaceans and mollusks. Some examples include shrimp, lobster and crab. Oysters, scallops and snails are shellfish, too. A person with this allergy may be allergic to one or more of them.

Symptoms

What happens when a person with this allergy is exposed to shellfish? Well, they can have a wide range of reactions. Their face, lips, mouth or throat may swell. They may have red spots on their skin. They may itch and break out in hives. They may have stomach pain, nausea, vomiting or diarrhea.

Anaphylaxis

If the reaction is severe, they may have trouble breathing. They may go into shock and lose consciousness. We call this "anaphylaxis." It's an emergency. Get medical help as soon as possible.

Managing this allergy

To manage a shellfish allergy, avoid shellfish and all foods that contain them. Read food labels carefully. Be careful when dining out. And watch for shellfish used as an ingredient in soups and flavorings.

Other tips

If you have this allergy, you need to stay away from places where shellfish are prepared. Don't touch shellfish. Don't inhale steam used to cook shellfish. And know that if you have this allergy, you may also be allergic to iodine or dye used in medical imaging. Your doctor will let you know if these are safe for you.

Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.