There are many different types of specific food allergies, but an allergy to protein is more broad. It generally affects children, but a small percentage of adults are affected as well. Some common foods that cause this allergy include tree nuts, legumes, milk and shellfish. When a protein allergy hits, it can be accompanied by symptoms.
Eyes and Nose
Two symptoms of protein allergies take place in the eyes and nose. Watery eyes and sneezing can take place.
Itching
The mouth, lips and throat can also be affected by protein allergies. Itching is one of the symptoms.
Skin
The skin can also show symptoms of a protein allergy. Eczema, rashes and hives can break out.
Stomach
The stomach can also experience discomfort. In the worst of cases, vomiting can take place.
Digestive System
Diarrhea is commonly associated with stomach flus and digestive disorders like irritable bowel syndrome. It is also a symptom of a protein allergy.