The most reason that causes of chronic sinusitis is attack which is flu, coldness or allergy attack. These are influencing to inflame of the sinus membranes. The main reason for sinusitis is blockade of the sinuses drainage openings and all this with collected bacteria, make great "ground for breeding" for themselves. Skin allergy not only that may be caused with the creams, body lotions, or other cosmetic products, but also it could be caused with the usage of the certain food, such as: beef, horse meat, eggs, pork, chicken, fish, soy, corn, dairy products, etc. In direct contact with the skin, the most usual is contact dermatitis. There are several products which you may use: Purifiers or Air Filters Pollution is the most association of outdoor air. Still, one of the main reasons for developing of the number of allergic symptoms is the home air. With the researching which done US Environmental Protection Agency in 1990, air pollution indoor ranked as "high priority health risk". Still, sometimes it could happen that this mechanism, immune system, makes some mistakes which cause allergies. These allergies are results of hypersensitive immune system. The main problem is that hypersensitive immune system, makes mistakes, so it identifies innocuous substances as bad and dangerous for the body and as results of that, immune system starts with attack to the substances with high level of ferocity. Still, here are some recommendations that you may follow for keeping control of your cat allergy: Try to use allergy reliefs and other product fro reducing reacting symptoms of in your home. Daily and constant ventilation of your hose by using air condition, but it is much better with opening your windows even and during rainy days will help you a lot. This filtering is from various contaminants and allergens, which includes dust mite feces, dust mites, pollen, animal's dander and mold spores. With Achoo Allergy you may find allergy relief air purifiers intended for rooms sizes 1100, 500, 250 square feet and less. There are several features of this system, so some of them are: powerful filtration filters for stopping of the smoke and control of gas.