Pollution

Large molecules of pollution that are inhaled often gets trapped in the mucous linings of the nose. These molecules's of pollution may cause an allergic reaction and inflammation of the mucous membranes and predispose you to infections.

Dust

The most common cause of Allergic Rhinitis is due to the dust mites found in dust. Try to live in an environment that is free of carpets and that can be easily dusted. If you are prone to dust allergens, cleaning cannot be over-emphasized. Here is more information on dust and dust mites.

Animal and Pollen

Animal, pollens and cockroaches can also trigger an allergic response in the nasal mucous. Try to avoid having pet in the home.

Mold

Any area that is warm and damp can be the perfect home for molds. Molds cause Allergic Rhinitis and therefore can pre-dispose you to Sinusitis.