What are the common factors that trigger allergies?

Genes & environment: Noses run in families. Allergy is strongly linked to inheritance. Cigarette smoking, especially during pregnancy, dramatically increases the risk of allergies in the child - even in children with no family history of allergy. Urban living. Asthma is directly correlated to living proximity to freeways and roads heavily trafficked by diesel trucks. Lack of sunshine - vitamin d deficiency are some.

Pollen dust pets: Many things in the environment can cause allergies...Pollen pets food dust bees. An allergist can be very helpful in figuring it out for you.