symptoms of shellfish allergy
It can take some time for symptoms to present after eating shellfish, but most develop within minutes. Symptoms of a shellfish allergy may include: 1  tingling in the mouth. 2  abdominal pain, nausea, diarrhea, or vomiting. 3  congestion, trouble breathing, or wheezing. 4  skin reactions including itching, hives, or eczema. 5  swelling of the face, lips, tongue, throat, ears, fingers, or hands. 6  lightheadedness, dizziness, or fainting.