Environmental/Respiratory
These are also known as seasonal allergies and include spring, summer, winter and fall allergies caused by grasses, weeds, pollen, molds and dust mites.
Hay Fever, also known as
allergic rhinitis, is a disorder of the immune system and causes allergic reactions to pollen and other substances. There are two kinds: seasonal (only at the time of the year that the pollen blooms) and perennial (year round).
Skin
These include hives, allergies to poison ivy and oak or sumac, insect bites, cosmetics and nickel.
Food
ng an allergy or are just intolerance. Food allergies can cause hives, rashes, upset stomach, diarrhea or even anaphylaxis, a life threatening allergic reaction. The most common food allergies or intolerances are milk, casein, egg, wheat, nuts, fish and shellfish.