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Respiratory Symptoms From Inhaled Substances

Respiratory Symptoms From Inhaled Substances

Allergens

An allergen is a substance which is capable of initiating an allergic reaction. The most important inhaled allergens are tiny invisible pollen grains, mold spores, house dust and animal danders.

Allergy-causing pollens come from plant flowers which at certain times of the year release large quantities of light buoyant pollen which can be carried for miles by the wind. These flowers are inconspicuous and often don’t really look like blossoms. They include trees which pollinate in spring, grasses in summer, and weeds in the fall. (See OAAC educational material handout Pollen Seasons) Ornamental flowers are generally not very important in allergy. They have large sticky pollen grains that are carried to other flowers by insects. They are not sufficiently abundant in the air to cause symptoms unless an allergic person is very close to them. However, some ornamental flowers are related to weeds. This is why some ragweed-allergic patients have symptoms when they are close to chrysanthemums, zinnias, asters, daisies, etc.

There are many types of molds in our environment. They have varying preferences for the types of places and conditions under which they grow into colonies. Some prefer to colonize indoors, some outdoors. The spores released by colonies are carried through the air to new places suitable for new colony formation. These spores are smaller than pollen grains but like pollens can cause allergic symptoms when they are inhaled.

The important constituents of house dust are the products of microscopic organisms found in most homes. House dust mites and molds thrive in warm moist conditions.

Like humans, fur-bearing animals continually grow new layers of skin. The indoor pet’s “dander” (tiny flakes of the outer layer of skin) falls off, disintegrates, and causes symptoms when inhaled. During early stages of allergy to a pet, patients are often unaware that the animal is contributing to their symptoms.

If a person is allergic to a pet, he/she should strictly avoid the animal. Outdoor pets are not of major concern. Pets that are confined to a limited part of the house (such as a tiled or wood-floored utility room and kitchen) are better then pets that contaminate the entire house. At the very least, pets should be kept out of the allergic person’s bedroom at all times. (See OAAC educational material handout Environmental Controls for Indoor Allergens.)

Irritants

An irritant is a substance which may trigger certain symptoms strictly because of its irritating effects. The symptoms mimic allergy, but in fact they are not really the result of an allergic reaction. Some individuals are extremely sensitive to these inhales substances (which incidentally bother the average person very little). The basis for this extreme membrane sensitivity is not well understood, but it is not allergy.

The most common offenders are smoke, cold air, wind, temperature changes, and weather fronts. Other provoking factors which bother some people in varying degrees include sharp pungent odors (paint, turpentine, aerosol sprays, perfumes, cleansers, cosmetics, chemical odors, exhaust smoke, insecticides, detergents and new fabric odors).

Respiratory infection is included in this category as is external wheezing in asthmatics.

Some substances are not only allergens or irritants but can be both. Examples include house dust, feed and grain dusts, and live Christmas trees. In any given patient allergens, irritants or a combination of both may be of major importance in the production of either asthma or nasal symptoms.

Occasionally patients who are sensitive to both irritants and allergens will have useful reduction in nasal and chest symptoms caused by irritants when their allergies are successfully treated. More commonly their susceptibility to irritants remains a separate problem and the treatment is by appropriate medication and avoidance. Irritant induced symptoms are more difficult to treat than those from allergens.

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How Can I Control Indoor Allergens and Improve Indoor Air Quality?

From the Asthma and Allergy Foundation https://aafa.org

Allergy and asthma control begins at home. Many people with allergies stay indoors when pollen and mold is high. But dust mites, pet dander and even cockroaches can cause problems indoors.1

The Environmental Protection Agency recommends three ways you can improve indoor air quality:2

  • Control your contact with indoor airborne allergens
  • Ventilate your indoor areas well
  • Use air cleaners to clean indoor air

Eight out of 10 people in the United States are exposed to dust mites. Six out of 10 are exposed to cat or dog dander. Cockroaches cause allergic reactions in people who live in the inner cities or southern parts of the United States. 3

Better air quality in your home, office, school and car can reduce allergy and asthma triggers.

What Size Are Allergens?

Allergens are substances that cause allergic reactions and trigger asthma symptoms in some people. The air spreads allergens around. They settle onto furniture and floors. They vary in size and are measured in microns (also called micrometers).4

Is It Possible to Control Indoor Allergens?

You can control indoor allergens with cleaning and reducing allergens in your home. The main sources of indoor allergens are:

  • Pets
  • Wall-to-wall carpet
  • Soft furniture
  • Stuffed toys
  • Bedding
  • Damp areas
  • Indoor plants
  • Mattresses that aren’t in allergy covers
  • Pillows and bedding you can’t wash in hot water

There may be more allergens on surfaces than in the air. Surface allergens enter the air easily when you disturb them by dusting or sitting.

Will Air Cleaning Devices Help?

Air cleaning devices might help. But the best way to improve your air quality is to get rid of the sources of allergens and irritants from your home. Take measures to avoid and reduce your contact with allergens. Also increase the flow of outdoor air into your home and reduce humidity as much as possible.

Reducing humidity decreases dust mites and mold growth. Air conditioners help reduce humidity too. They can also prevent outdoor allergens. Keep your windows and doors closed. Turn your air conditioner on recirculate. These steps can help reduce outdoor allergens like pollen and mold.

Air cleaners with CERTIFIED asthma & allergy friendly® filters can filter almost 98% of allergen particles in the air. Look for CERTIFIED asthma & allergy friendly® devices.

What Steps Can I Take to Control Indoor Allergens?

Control dust mites. Keep surfaces in your home clean and uncluttered. Bare floors and walls are best, especially in the bedroom where you spend one-third of your time. Avoid wall-to-wall carpet, if possible. If you must have carpet, use low-pile carpets or throw rugs you can wash. Also avoid heavy drapes and overstuffed fabric furniture. Replace drapes and blinds with roll-down shades or washable curtains.5

Use zippered allergen-resistant or plastic covers on your pillows, mattresses and box springs. These covers are very effective in controlling your contact with dust mites. Encasing mattresses works better than air cleaners to reduce allergy symptoms. Wash your bedding, uncovered pillows and stuffed toys in water 130 degrees Fahrenheit or hotter each week. Dry them in a hot dryer cycle to kill dust mites.

Vacuum once or twice a week. Vacuuming helps keep allergens low. But poor quality vacuums could put dust into the air. Look for CERTIFIED asthma & allergy friendly® vacuums. These vacuums have been tested and found to prevent allergens from going back into the air.

If you have allergies, wear a mask while doing housework. Use a cloth that is damp or treated with polish for dusting. Leave the house for several hours after cleaning it.

Prevent pet dander. Most doctors suggest that people who have allergies to animal dander not have pets with feathers or fur. There is no such thing as a hypoallergenic pet. People with pet allergies are allergic to animal dander which are shed skin cells that all animals have. Some animal dander has fewer allergenic proteins. This may lead to fewer or no symptoms.

Keep pets out of your bedroom. Close the doors to bedrooms when you are not home to keep pets out. Cover vents with dense material like cheesecloth. Animal allergens are sticky. Wash and change your animal’s favorite furniture and toys often.

Replace wall-to-wall carpet with bare floors or a low-pile carpet. Bathing and brushing your pets often may reduce symptoms. But avoid grooming your pets if you have animal allergies. If you must groom them, wear a mask.

Long-haired pets can also bring pollen inside in high pollen seasons like spring and fall.

If you suspect you have a pet allergy, see a board-certified allergist for allergy testing.

Prevent pollen from getting inside by keeping windows and doors closed. Use air conditioning in warm weather to control dust mites and reduce humidity. Change filters often.

Avoid mold spores. Reduce moisture around the bathroom, kitchen and other areas where there is a lot of water. Here are some ways you can reduce mold:

  • Don’t run your showers for a long time before bathing.
  • Use dehumidifiers to reduce both mold and dust mites.
  • Use humidity monitors.
  • Limit yourself to a few house plants.
  • Fix all leaks and other causes of damp areas.
  • If you see mold on a surface, clean it immediately. Wear a mask and clean the surface each week to keep it from returning.

Control cockroaches. Do not leave food or garbage uncovered. Use poison baits, boric acid and traps instead of chemicals. Chemicals may irritate your sinuses and asthma.

The post How Can I Control Indoor Allergens and Improve Indoor Air Quality? appeared first on Oklahoma Allergy and Asthma Clinic.

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