Symptoms of a shellfish allergy can include hives, itching of the skin, abdominal pain, diarrhea and a tingling in the mouth, according to Mayo Clinic. For severely allergic individuals, symptoms can also include swellin... More »

According to the Cleveland Clinic, anyone can suddenly develop an allergy to shellfish. They report that a shellfish allergy actually is more common in adults and older children. More » Health Conditions & Diseases Allergies

When scheduling a cat scan, or CT, or other test requiring a contrast injection, experts may advise premedicating or using a different type of dye for patients with seafood allergies because those individuals experience ... More »

Symptoms of shellfish allergy include swelling, itching, tingling in the mouth, wheezing and abdominal pain, states Mayo Clinic. Medical attention is necessary for such symptoms, which occur when the body's immune system... More » Health Conditions & Diseases Allergies

Symptoms of a soy allergy may include abdominal pain, tingling in the mouth, wheezing, swelling of the throat or facial area, skin redness, itching and hives, as listed by Mayo Clinic. Symptoms of anaphylaxis, a more sev... More » Health Conditions & Diseases Allergies

Symptoms of an allergic reaction to wheat include swelling, itching or irritation of the mouth, skin rashes, nasal congestion, headaches, vomiting, intestinal cramping, diarrhea and, in severe cases, anaphylaxis, accordi... More »

Symptoms of shellfish or seafood allergies include abdominal pain, diarrhea, vomiting and nausea, according to Healthline. Other symptoms include a tingling sensation in the mouth, trouble breathing, congestion, hives or... More » Health Conditions & Diseases Allergies