Allergic Rhinitis

An allergy is a reaction of your immune system to something that does not bother most other people. People who have allergies often are sensitive to more than one thing. Substances that often cause reactions are:
Pollen
Dust mites
Mold spores
Pet dander
Food
Insect stings
Medicines

How do you get allergies?

Scientists think both genes and the environment have something to do with it. Normally, your immune system fights germs. It is your body’s defense system. In most allergic reactions, however, it is responding to a false alarm.
Allergies can cause a runny nose, sneezing, itching, rashes, swelling or asthma. Symptoms vary. Although allergies can make you feel bad, they usually won’t kill you. However, a severe reaction called anaphylaxis is life-threatening.
Symptoms can include
Sneezing, often with a runny or clogged nose
Coughing and postnasal drip
Itching eyes, nose and throat
Dark circles under the eyes
Taking medicines, using nasal sprays and rinsing out your nose can relieve symptoms. Allergy shots can help make you less sensitive to pollen and provide long-term relief.