Skin Conditions

• Breaking out in hives, developing ezcema or severe itching of the skin is one group of symptoms consistent with shellfish allergies.
  
  

Breathing Difficulties

• If you are allergic to seafood, you may have a hard time breathing. This symptom can range from wheezing to a closing-up of your airways.
  
  

Swelling

• Swelling often occurs in people who display seafood allergies. The lips, mouth and throat are commonly affected, along with a tingling feeling in those areas.
  
  

Abdominal Issues

• Stomach pain, vomiting and nausea after ingesting seafood may indicate that you are allergic.
  
  

Lightheadedness

• Symptoms of shellfish allergies include feeling lightheaded or dizzy. Fainting may occur in more severe cases.