Running nose, watering eyes, itching and other manifestations of allergies affect not only adults, but also children. Our offspring are not protected against allergies at any age, especially if parents are sensitive to a certain allergen. Sometimes, allergy goes away by itself, as the child grows older, but sometimes you have to live with it throughout the life.
Allergy is the reaction of the immune system to an irritant that is unpleasant to it (such as dust mites, animal fur, pollen). It results in producing various substances, which provoke an inflammatory reaction, and such illnesses as allergic rhinitis, atopic dermatitis, hives, and food allergy. Allergy is not contagious; it is not transferred from one child to another. Sometimes, several hours will pass before the allergic reaction, which can be confusing and it might not occur to us that it is the milk you had or the cat you petted several hours before that is to blame.
Most frequent symptoms that make parents think it might be an allergy:
Main allergy agents in children include food (milk and dairy products, eggs, peanut butter, oranges, chocolate, soy beans, tomatoes, fish and wheat) and inhaled irritants (dust mite, pollen, animal fur and mould). Sometimes, allergic reaction can be expected after consuming products rich in food dyes and preservatives — candy, condiments, ice-cream, cookies can be to blame.
Symptoms of the allergic reaction to dairy, especially cow's milk, do not differ from lactose intolerance symptoms, which is why a visit to the doctor is a must to determine the right diagnosis.
Source: Murtagh’s Patient Education 6 Edition