Allergies Support Group
When the immune system responds to a foreign substance in an abnormal way, it is classified as an allergy. When the body first contacts the substance, it will not cause any reactions, but the immune system will start to produce antibodies to it and subsequent contact will trigger more dramatic responses. Depending on the allergy, the response could be mild or very severe...
Plus there's a substance called quercetin that is greatly helpful for nasal health and allergies. It is found if foods like tomatoes, red grapes, cranberries and very high in red onions. You can buy this as a supplement also, but I like to personally get this from food.
Hope this helps.