
The foods most commonly associated with food allergy are cow's milk, wheat, seafood, eggs, soy and peanuts. The main symptoms are hives, eczema, itching, vomiting, diarrhoea, abdominal pain, nasal congestion and wheeze.
Mild allergy affecting asthma occurs in probably one out of 50 children under the age of two. Most childhood food allergies are out-grown by the age of three. In older children and adults it is less frequent, affecting about one in 500 people. If the common foods causing allergies are not introduced to a child's diet until they are two they are less likely to develop life long allergies.