A foodallergy is an adverse immune response to a food protein. It is an immune system reaction that occurs soon after eating a certain food. They are different from other adverse responses to food, such as food intolerance, pharmacological reactions, and toxin-mediated reactions. The protein in the food is the most common allergic component. Some food allergens include milk, nuts, shellfish, egg, soy products etc. The symptoms include digestive problems, wheezing, Diarrhoea, Vomiting, nausea, hives or swollen airways. A food allergy can cause severe symptoms or even a life-threatening reaction known as anaphylaxis, which needs immediate medication