Allergy is more common than you think. The only way to find out what you are allergic to is to get yourself tested. If you are not sure, comprehensive allergy test is the right test for you.
Inhalant allergy is more common than you think. Most appear during childhood, but some appear later in life. Very often, it is impossible for us to find out what inhalant we are allergic to, because inhalant allergic reaction usually appears hours after we come in contact with a specific inhalant. Inhalant includes house dust mites, molds, pollen and animals.