Sardine is the categories of fish which belongs to Sardina genera. Usually, Sardine fish are easily perishable and are eaten canned but they could be eaten fresh as well. Seafood allergies are not rare and nearly 1% of the world's population is allergic to seafood. The signs of allergies to sardines vary for various individuals. Most people who have allergies towards Sardine face reaction such as swelling of throat and swelling of airways. If you face some similar type of allergic reactions after eating Sardine, you must get a proper medical attention. Sardine allergy is detected using a sample of blood and measuring the lgE antibodies present in the blood.