Allergic rhinitis is a diagnosis associated with a group of symptoms affecting the nose. These symptoms occur when you breathe in something you are allergic to, such as dust, animal dander, or pollen. Symptoms can also occur when you eat a food that you are allergic to.
Causes An allergen is something that triggers an allergy. When a person with allergic rhinitis breathes in an allergen such as pollen, mold, animal dander, or dust, the body releases chemicals that cause allergy symptoms.
Hay fever involves an allergic reaction to pollen. Plants that cause hay fever are trees, grasses, and weeds. Their pollen is carried by the wind. (Flower pollen is carried by insects and does not cause hay fever.) Types of plants that cause hay fever vary from person to person and from area to area. The amount of pollen in the air can affect whether hay fever symptoms develop. Hot, dry, windy days are more likely to have a lot of pollen in the air. On cool, damp, rainy days, most pollen is washed to the ground.
Hay fever and allergies often run in families. If both of your parents have hay fever or other allergies, you are likely to have hay fever and allergies, too. The chance is higher if your mother has allergies.
Exams and Tests
The health care provider will perform a physical exam and ask about your symptoms. You will be asked whether your symptoms vary by time of day or season, and exposure to pets or other allergens.
Allergy testing may reveal the pollen or other substances that trigger your symptoms. Skin testing is the most common method of allergy testing. If your doctor determines you cannot have skin testing, special blood tests may help with the diagnosis. These tests, known as IgE RAST tests, can measure the levels of allergy-related substances. A complete blood count (CBC) test called the eosinophil count may also help diagnose allergies.
Treatment
Lifestyle and avoiding allergens
The best treatment is to avoid the pollens that cause your symptoms. It may be impossible to avoid all pollen. But you can often take steps to reduce your exposure. You may be prescribed medicine to treat allergic rhinitis. The medicine your doctor prescribes depends on your symptoms and how severe they are. Your age and whether you have other medical conditions, such as asthma, will also be considered. For mild allergic rhinitis, a nasal wash can help remove mucus from the nose. You can buy a saline solution at a drugstore or make one at home using one cup of warm water, half a teaspoon of salt, and pinch of baking soda.
Treatments for allergic rhinitis include:
Antihistamines
Medicines called antihistamines work well for treating allergy symptoms. They may be used when symptoms do not happen often or do not last long. Be aware of the following: Many antihistamines taken by mouth can be bought without a prescription. Some can cause sleepiness. You should not drive or operate machines after taking this type of medicine.
Others cause little or no sleepiness. Antihistamine nasal sprays work well for treating allergic rhinitis. Ask your doctor if you should try these medicines first.
Corticosteroids Nasal corticosteroid sprays are the most effective treatment for allergic rhinitis. They work best when used nonstop, but they can also be helpful when used for shorter periods of time. Corticosteroid sprays are generally safe for children and adults. Many brands are available. You can buy one brand without a prescription. For all other brands, you will need a prescription from your doctor.
Decongestants
Decongestants may also be helpful for reducing symptoms such as nasal stuffiness. Do not use nasal spray decongestants for more than 3 days.
Allergy shots Allergy shots (immunotherapy) are sometimes recommended if you cannot avoid the pollen and your symptoms are hard to control. This includes regular shots of the pollen you are allergic to. Each dose is slightly larger than the dose before it, until you reach the dose that helps control your symptoms. Allergy shots may help your body adjust to the pollen that is causing the reaction.
Outlook (Prognosis)
Most symptoms of allergic rhinitis can be treated. More severe cases need allergy shots.Some people, especially children, may outgrow an allergy as the immune system becomes less sensitive to the trigger. But once a substance, such as pollen, causes allergies, it often continues to have a long-term effect on the person.
Prevention
You can sometimes prevent symptoms by avoiding the pollen you are allergic to. During pollen season, you should stay indoors where it is air-conditioned, if possible.