People can develop allergies to a wide variety of foods, including nuts, dairy products, shellfish, eggs, and
wheat. Symptoms include lip and
mouth swelling, nausea, stomach pains, and
diarrhea, in addition to vomiting. The itchy rash that typically develops is also known as hives and tends to appear as large, flat, pink or red bumps.
The symptoms tend to develop quickly, in as little as a few minutes or seconds after eating the trigger food.