2.    Eggs

According to the Mayo Clinic, an egg allergy occurs when the immune system thinks that egg proteins are harmful to the body. Consequently, the body releases histamines and other substances that cause a reaction.

Though egg yolks and egg whites both can cause reactions, reactions to egg whites are the most common. This allergy is common when it comes to children and food allergens. But the majority of kids outgrow this allergy before reaching adolescence. Symptoms are said to develop within a few minutes to several hours after consuming eggs.

3.    Fish

Fish allergies can be life-threatening; however, they’re less common than other allergies. According to the American College of Allergy, Asthma and Immunology (ACCAAI), finned fish can be fish allergy triggers. These can include tuna, halibut and salmon. And if you’re allergic to fish, you may not be allergic to shellfish – it varies in each person.

When it comes to fish allergies, it’s important to avoid cross-contact that can occur when fish is cooked. In fact, avoiding places where fish is cooked is recommended. Consequently, the ACCAAI suggests avoiding seafood restaurants altogether. Proteins released into the air can prove dangerous for those who suffer from a fish allergy.

4.    Shellfish

Shellfish allergies occur when those who suffer from them eat marine animals with shells. According to the Mayo Clinic, allergens can include shrimp, crab, oysters, lobster, squid and scallops. Shellfish are broken up into two groups: crustaceans and mollusks. Crabs, lobsters and shrimp are crustaceans. But snails, clams and oysters are mollusks. Those with shellfish allergies can be allergic to all shellfish or just certain types.