After that cat lick itself, Fel d 1 is grooming and it is deposited on its fur. After this happen the dried specks of saliva may float off and come around of your home. Still, the protein may be everywhere in your home. It could be on your furniture, windows, walls, beds, pillows and other. 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. It should to mention that these substances are not harmful to your organism, but your immune system recognize them as dangerous, so try to beat them. First contact will not be so dangerous and your organism will not react as it will react next time. Next reaction of your body with contact of some of these allergens will be showed with the symptoms of allergens, such as: skin rashes, sneezing, swelling, itching, wheezing, difficult breathing, coughing, anaphylaxis or even in the worst case death. They may be ranged from mildly inconvenient and up to total collapse of the body, followed in the worst cases with the death, but there are also and symptoms of food allergy which are known as anaphylaxis. Anaphylaxis is followed with violent allergic reaction from certain types of the food. Most usually symptoms of the food allergy are: Feeling of tingling in the mouth Tongue and throat swelling Problem with breathing, difficult breathing Hives Vomiting Crams in the stomach Diarrhea Blood pressure In the worst cases death Usually these signals appear after minutes to two hours after that you have entered certain food on which you are allergic. So, there are people who may get food allergies, caused by food, or better said with substances contained in the food which they eat. But, there are and other allergies, so it may comes to the allergic reactions to the person form the air, which they are breathing, such as allergies on the dust, mites, pollen or other. Still, sinusitis is often followed with pressure on the face or with pain, usually in the period of the end of the bending, green or yellow mucus or post nasal drip mostly at night. Also, chronic sinusitis may be longer duration than allergies. Sinus and Allergy Relief Considering that both and allergies and sinus have mostly same symptoms, the treatment for both of them may be same. Majority people are outgrow their food allergies, but there are and people who are allergic on certain food for whole life. In that case the best solution is to avoid these foods. So, before you have to eat something, it is recommendation to read all ingredients for that you need to eat. If you find that food contain ingredients on which you are allergic, you shouldn't eat it.