We speak of an allergy as the body reacts violently to a harmless substance itself in non-allergic people have no reaction. Those allergic reaction takes place in the skin, respiratory or gastrointestinal tract.

The basically harmless substances such allergies trigger, called allergens. This can be many different things: base metals, dust mites, pollen, cat dander, strawberries, to name but a few.

Once you are in contact with such substances come, remember that the immune system. Auto antibodies against that allergen are then created. It arises in the body including a reaction in which histamine is excreted. This leads to an allergic reaction.

Whenever your body comes back into contact with that substance, which is recognized by the immune system. If you’re allergic to, follow an allergic reaction. So if you are allergic to the allergens of cat, there will always be a reaction if you come into contact with cats.

Moreover it is possible to build an allergy, so maybe someone responds as a child is not allergic to cats, but later in life is. There are many symptoms which may indicate an allergy, such as irritated skin, breathing difficulties, runny nose, sneezing, itching and abdominal pain.