There are several symptoms which are related as airborne allergens symptoms: Mites as well as dust Smoke from cigarettes Bacteria Pollen Viruses Gas molecules Mold spores Still, it could not be said that outdoors there are not contaminants which may cause symptoms of the allergies. This includes next: ammonia, acetaldehyde, carpets, paints, formaldehyde, adhesives, etc. So, if you have two or more cats or other animals in your home, sprays maybe will not give you effectively results. But, tannic acids, may make stain on your light furniture or light carpets, so it is not recommendation to use it on light surfaces. Dehumidifiers Dehumidifiers are good investment if you are leaving in the humid areas. There are symptoms which are only mildly inconvenient, such as swelling or itching, but also there are and symptoms which may be very uncomfortable, such as diarrhea, difficult breathing, vomiting or other. Still, the worst things that symptoms of allergies may cause are death and anaphylaxis, known as collapse due the allergies. Furry pets, such as dogs and cats contain proteins which are found in the saliva, skins and urine of them. You may influence on developing of these symptoms if you are touching animals or if you are in contact with dust from your house which is full of animal dander. Connected with the previous allergen, there are also and allergen which are present all over your house and it is dust and dust mites. Even if you are eating out in restaurant and you are ordering food that is not familiar to you, try always to discuss about ingredients of it. 3. Take Extra Supplies. Whenever that you go out you should to take extra supplies. It is because it could happen that you may spend more time on some places than you have planned. But, thing that is very interesting is that this allergen may remain for years in your home, no matter that you don't have cat anymore in your house. Totally cleaning is must if you want to protect yourself from cat allergy. Symptoms of Allergy There are various places of your body that may react on the allergy symptoms.