3 doctors weighed in:

Have eaten softshell crabs and crabcakes for years. Tell me please what causes crab allergies?

3 doctors weighed in
Dr. Lee Perry
Internal Medicine - Allergy & Immunology
2 doctors agree

In brief: Shellfish protein

The part of the crab (or shellfish) that most commonly leads to allergy is the protein found in the food.
I would recommend skin testing to crab and other shellfish at an allergist's office.

In brief: Shellfish protein

The part of the crab (or shellfish) that most commonly leads to allergy is the protein found in the food.
I would recommend skin testing to crab and other shellfish at an allergist's office.
Dr. Lee Perry
Dr. Lee Perry
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