MULTIPLE FOOD ALLERGIES CAN OCCUR IN TWO PATTERNS
A person is predisposed to be allergic
A person with one food allergy has a higher chance of having other, unrelated food allergies. Also, there is significant overlap of allergic conditions in people who have eczema, food allergies, seasonal allergies like hay fever, and/or asthma.
A person is allergic to multiple foods because they contain similar proteins
In some cases, a person may be allergic to multiple foods in a food family.