Nasal allergies (also called allergic rhinitis) are a common health problem. They may be seasonal. This means they cause symptoms only at certain times of the year. Or they may be perennial. This means they cause symptoms all year long. Other health problems, such as asthma, often occur along with allergies as well.
An allergy is a reaction to a substance called an allergen. Common allergens include:
Wind-borne pollen (from grass, trees, ragweed)
Furry and feathered animals
Pests, such as cockroaches or rodents in a home or other building
Normally allergens are harmless. But when a person has allergies, the body thinks these allergens are harmful. The body then attacks allergens with antibodies. Allergy antibodies are attached to special cells called mast cells. Allergens stick to the antibodies. This makes the mast cells release histamine and other chemicals. This is an allergic reaction. The chemicals irritate nearby nasal tissue. This causes nasal allergy symptoms. When this happens in the breathing tubes of the lungs, it can cause asthma symptoms such as cough and wheeze.
Allergies can cause nasal tissue to swell. This makes the air passages smaller. The nose may feel stuffed up or itchy. The nose may also make extra mucus. This can plug the nasal passages or drip out of the nose. Mucus can drip down the back of the throat (postnasal drip) as well. Sinus tissue can swell. This may cause pain and headache. Common allergy symptoms include:
Runny nose with clear, watery discharge
Stuffy nose (nasal congestion)
Drainage down your throat (postnasal drip)
Red, watery eyes
Itchy nose, eyes, ears, and throat
Plugged-up ears (ear congestion)
Sinus pain and swelling
Other health problems can cause symptoms like those of nasal allergies. These include:
Nonallergic rhinitis and viruses such as colds
Irritants and pollutants such as strong odors or smoke
Common home cleaning products, especially if they have strong odors.
Changes in the weather
Your healthcare provider will evaluate you to find the cause of your symptoms. Then he or she will advise treatment. If your symptoms are due to nasal allergies, your provider may prescribe nasal steroid sprays or antihistamines taken by mouth (oral) to help reduce symptoms. Staying away from the allergen will also be suggested. You may also be referred to an allergist.
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