Causes of Allergic Rhinitis

Causes

The allergic process, called atopy, occurs when the body overreacts to a substance that it senses as a foreign “invader”. The immune system works continuously to protect the body from potentially dangerous intruders such as bacteria, viruses, and toxins. However, for reasons not completely understood, some people are hypersensitive to substances that are typically harmless. When the immune system inaccurately identifies these substances (allergens) as harmful, an allergic reaction and inflammatory response occurs.

• The antibody immunoglobulin E (IgE) is a key player in allergic reactions. When an allergen enters the body, the immune system produces IgE antibodies. These antibodies then attach themselves to mast 
• cells, which are found in the nose, eyes, lungs, and digestive tract.   

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