What is allergies?
How does allergies occurs?
Symptoms of allergies
Allergy test
Treatments for allergies
Preventions of allergies
Dust Allergies
Food Allergies
Mold Allergies
Pet Allergies

How does allergies occurs?

Allergies are immune reactions to normally harmless substances. Think of the immune system as an army. The immune system is made up of antibodies that serve as soldiers. These antibodies are on watch for the enemy, normally a protein from a virus or a bacterium. They are known as antigen. When the enemy are engaged the antibodies helps mount the attack by activating mast cells, which causes a local inflammatory reaction. Inflammation occurs when there is an accumulation of cells, fluid and blood that normally helps fight inflections or heal a wound, but this may cause discomfort or swelling.

Allergen is a substance that sets off the immune system in allergy. They are harmless to people without an allergy. Most allergic reactions occur shortly after exposure to an allergen. For example, seasonal allergies are likely to worsen on the same day that the pollen count goes up. If you are allergic to cats and you visit the home of someone who owns a cat, you are likely to start developing an allergic reaction before you leave the house. Not all allergic reactions start immediately, e.g. some form of contact of dermatitis (such as poison ivy) may take more than a day or two to develop.

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