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Also, depending on the season, the symptoms may be more severe and people may experience coughing, wheezing, and irritability.A few people even become depressed, lose their appetite, or have problems sleeping.Moreover, since the sinuses may also become congested, some people experience headaches.If both parents suffered from allergies in the past, there is a 66% chance for the individual to suffer from seasonal allergies, and the risk lowers to 60% if just one parent had suffered from allergies.
These include peanuts, tree nuts, eggs, milk, shellfish, fish, wheat and their derivatives, and soy and their derivatives, as well as sulfites (chemical-based, often found in flavors and colors in foods) at 10ppm and over. It should be noted that other countries, in view of the differences in the genetic profiles of their citizens and different levels of exposure to specific foods due to different dietary habits, the "official" allergen list will change.
Some symptoms that differentiate allergies from a cold include: Among seasonal allergies, there are some allergens that fuse together and produce a new type of allergy.
For instance, grass pollen allergens cross-react with food allergy proteins in vegetables such as onion, lettuce, carrots, celery and corn.
Canada recognizes all eight of the allergens recognized by the US, and also recognizes sesame seeds, The European Union additionally recognizes celery.
Another allergen is urushiol, a resin produced by poison ivy and poison oak, which causes the skin rash condition known as urushiol-induced contact dermatitis by changing a skin cell's configuration so that it is no longer recognized by the immune system as part of the body.