Food allergies may be the reason for itching or a rash that occurs right after consumption, particularly in children.
Actions you can take
Some widespread food allergens include milk, eggs, peanuts, wheat, nuts, soy and seafood. The majority of people are allergic to only one, two or at the most three foods. If you suspect a food allergy, you have to think carefully. Even though the before mentioned food are most common allergens, any food could be. You can exclude the most obvious offenders for a week to see if you notice any changes.