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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.

Recent News

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OKC ranked 6th most challenging city in the U.S. for pollen allergies

The Asthma and Allergy Foundation of America (AAFA) released its annual Allergy Capitals™ report for 2022 on March 2. The report identifies the most challenging cities for spring and fall allergies in the top 100 metropolitan areas in the continental United States. Cities are ranked based on spring and fall pollen scores, over-the-counter medicine use, and availability of board-certified allergists/immunologists. Oklahoma City was ranked sixth most challenging city and Tulsa ranked 21st.

For the second year in a row, Scranton, Pennsylvania, takes the top spot based on its high spring and fall pollen scores and lower-than-average number of allergy/immunology specialists per patient. The top 20 Allergy Capitals™ for 2022 are: 1. Scranton, PA 2. Wichita, KS 3. McAllen, TX 4. Richmond, VA 5. San Antonio, TX 6. Oklahoma City, OK 7. Hartford, CT 8. Buffalo, NY 9. New Haven, CT 10. Albany, NY.

AAFA began identifying annual Allergy Capitals™ in 2003. Since that first report, seasonal allergies have worsened. Climate change has caused the growing seasons to get longer and warmer, leading to higher pollen counts in both spring and fall. The warmer temperatures also get trapped in urban areas, which impacts air pollution. Urban areas are also often designed to have wind-pollinating trees instead of fruiting (or insect-pollinating) trees.

“Climate change is a public health emergency. More than 24 million people in the U.S. have seasonal allergic rhinitis which is most often caused by pollen allergies,” says Kenneth Mendez, CEO and president of AAFA. “If we don’t slow down the warming temperatures, pollen production will only intensify. This means symptoms could worsen as climate change continues to evolve.”

Allergies can also trigger asthma episodes or attacks. Around 60-80 percent of the 25 million people in the U.S. with asthma have allergic asthma.

“We see spikes in emergency room visits that coincide with spikes in pollen seasons,” said Mendez. “Around 3,600 people per year die from asthma, so it is important to address and manage asthma and allergy triggers where you live.”

Black, Hispanic, and Indigenous populations bear the disproportionate burden of air pollution, asthma, allergies, and climate change. This is the result of long history of housing policies in the U.S. that discriminate against these groups. These policies have pushed people of color to live in undesirable neighborhoods with greater environmental and social risks. As a result of systemic racism in U.S. policies, governance, and culture, racial and ethnic minority populations are more vulnerable to the health impacts of climate change.

“AAFA’s Allergy Capitals™ report helps raise awareness of the impact of pollen and climate change on individual and community health,” says Melanie Carver, chief mission officer of AAFA. “While there are steps individuals can take to manage their allergies, we need communities to improve their city planning and take action on health disparities impacting higher risk populations.”

For people who are impacted by pollen allergies, there are options available to prevent or treat allergy symptoms.

A board-certified allergist can diagnose allergies, and determine the specific triggers that cause them, through simple tests. The allergists at Oklahoma Allergy & Asthma Clinic (OAAC) evaluate and manage patients of all ages.  The main clinic is on the Oklahoma Health Center campus.  For patient convenience, satellite offices are in Edmond, Norman, Midwest City and Yukon.

The post OKC ranked 6th most challenging city in the U.S. for pollen allergies appeared first on Oklahoma Allergy and Asthma Clinic.

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