Sensitization is the first acquaintance of a child (and an adult, too) with an allergen with consequences following the familiarity. Sensitization is the familiarity of the body with allergens, their perception. In this case, the allergic reaction never occurs on the very first contact, but only on repeated contact with this allergen-dust, pet hair, food, pollen, etc. Then a clinical picture of the allergy appears.
In other words, sensitization in a child - this is his heightened sensitivity to any allergen. After the first contact with the allergen, the child's body is sensitized, that is, familiar with the allergen and knows how to react.
The trouble is that it is unclear what will turn out to be that fateful acquaintance and when the consequences fall upon the head. A person may not even suspect that his immunity is already working in an undesirable direction.
What causes the phenomenon of sensitization in a child?
These are toxins and antigens of viruses and bacteria, many medicinal medicines and other chemicals and industrial poisons. Secondary contact with the allergen in a sensibilized organism causes an allergic reaction - anaphylaxis, urticaria, etc. The period of sensitization is determined by the time between the moment the allergen enters the body for the first time and the appearance of an increased sensitivity to it. The period can last from several days to several years.
In a child, sensitization and immunity can develop simultaneously. Sometimes there is a so-called. autosensitization - to their own damaged proteins as a result of the formation of autoallergens. This happens in autoimmune diseases.
The earliest sensitization develops in the child to foodstuffs in the first year of life . In this early transfer to artificial nutrition increases the sensitivity of the child's organism to food allergens. In addition, the lack of vitamins in the mother's diet also plays a role. However, some researchers believe that the effect of food on the sensitization of the child's body is not so significant, and the introduction of allergens into the diet may not cause an allergic exacerbation. The final result still depends on the dose of the allergen and the individual sensitivity of the child's body.
Preventive vaccinations can also provoke sensitization of the body with the subsequent occurrence and development of allergies.