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| URL | https://www.nicklauschildrens.org/conditions/shellfish-allergy |
| Last Crawled | 2026-04-01 17:10:47 (8 days ago) |
| First Indexed | 2019-06-26 18:04:33 (6 years ago) |
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| Meta Title | What is shellfish allergy? | Nicklaus Children's Hospital |
| Meta Description | Shellfish allergy is when you have an allergic reaction to crab, lobster, shrimp, oysters, scallops, clams, or other shellfish. |
| Meta Canonical | null |
| Boilerpipe Text | What is shellfish allergy?
Food allergies are when a person develops allergy antibodies (
IgE antibodies
) to a protein in a food, and when exposed to this protein it causes an allergic reaction. Shellfish allergy is when you have an allergic reaction to crab, lobster, shrimp, oysters, scallops, clams, or other shellfish. This is different from a fish allergy.
What causes shellfish allergy?
We do not know why certain people develop food allergies and others do not. There are many theories as to why food allergies are becoming more prevalent.
What are the symptoms of shellfish allergy?
Symptoms of an allergic reaction to shellfish are: hives, swelling, wheezing, difficulty breathing, nausea, vomiting, diarrhea, and stomach cramping.
What are shellfish allergy care options?
The only option at this time is to strictly avoid shellfish. Even small amounts of the proteins in shellfish that are ingested can cause a severe allergic reaction. Everyone diagnosed with food allergy should have a food allergy action plan, and carry an auto injectable epinephrine device, as this is the only medication that treats
anaphylaxis
(a severe allergic reaction).
There is a chance that people can grow out of their food allergies. A
board certified allergist
can evaluate and determine if these foods can be reintroduced into the diet.
Reviewed by:
Amy S Feldman, MD
This page was last updated on:
June 03, 2025 12:46 PM
Check Your Symptoms
Use the symptom checker tool to check how serious your symptoms are, if a healthcare
visit is needed, and what steps you can take to relieve your symptoms at home.
Learn more about
Food Allergies
Food allergies are when a person develops allergy antibodies (IgE antibodies) to a protein in a food, and when exposed to this protein it causes an allergic reaction.
Anaphylaxis
Anaphylaxis is an acute life threatening allergic reaction with symptoms from many body systems.
IgE-Mediated Food Allergies
IgE type of food allergy refers to a specific type of abnormal immediate-type hypersensitivity immune inflammatory reaction, usually to a protein in a food. |
| Markdown | null |
| Readable Markdown | ## What is shellfish allergy?
Food allergies are when a person develops allergy antibodies ([IgE antibodies](https://www.nicklauschildrens.org/conditions/ige-mediated-food-allergies)) to a protein in a food, and when exposed to this protein it causes an allergic reaction. Shellfish allergy is when you have an allergic reaction to crab, lobster, shrimp, oysters, scallops, clams, or other shellfish. This is different from a fish allergy.
## What causes shellfish allergy?
We do not know why certain people develop food allergies and others do not. There are many theories as to why food allergies are becoming more prevalent.
## What are the symptoms of shellfish allergy?
Symptoms of an allergic reaction to shellfish are: hives, swelling, wheezing, difficulty breathing, nausea, vomiting, diarrhea, and stomach cramping.
## What are shellfish allergy care options?
The only option at this time is to strictly avoid shellfish. Even small amounts of the proteins in shellfish that are ingested can cause a severe allergic reaction. Everyone diagnosed with food allergy should have a food allergy action plan, and carry an auto injectable epinephrine device, as this is the only medication that treats [anaphylaxis](https://www.nicklauschildrens.org/conditions/anaphylaxis) (a severe allergic reaction).
There is a chance that people can grow out of their food allergies. A [board certified allergist](https://www.nicklauschildrens.org/medical-services/allergy-immunology/pediatric-allergy-immunologists) can evaluate and determine if these foods can be reintroduced into the diet.
***
***Reviewed by:** [Amy S Feldman, MD](https://www.nicklauschildrens.org/find-a-physician/physician-details/en/1538303631/amy-feldman-allergy-immunology)*
***This page was last updated on:** June 03, 2025 12:46 PM*
[Check Your Symptoms](https://www.nicklauschildrens.org/forms/symptom-checker)
Use the symptom checker tool to check how serious your symptoms are, if a healthcare visit is needed, and what steps you can take to relieve your symptoms at home.
***
### Learn more about
[Food Allergies](https://www.nicklauschildrens.org/conditions/food-allergies)
Food allergies are when a person develops allergy antibodies (IgE antibodies) to a protein in a food, and when exposed to this protein it causes an allergic reaction.
[Anaphylaxis](https://www.nicklauschildrens.org/conditions/anaphylaxis)
Anaphylaxis is an acute life threatening allergic reaction with symptoms from many body systems.
[IgE-Mediated Food Allergies](https://www.nicklauschildrens.org/conditions/ige-mediated-food-allergies)
IgE type of food allergy refers to a specific type of abnormal immediate-type hypersensitivity immune inflammatory reaction, usually to a protein in a food. |
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