Asthma: Controlling Triggers

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KEY POINTS

• Asthma is a chronic lung disease that causes coughing, wheezing, and shortness of breath.
• Symptoms can get worse when your child is exposed to asthma triggers like smoking, pollen, mold, dust, or other things in the environment.
• Limiting exposure to these triggers can help prevent problems for your child.

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Asthma is a long-lasting (chronic) lung disease. It causes coughing, wheezing, and shortness of breath.

Asthma symptoms are caused by two different problems in the airways.

• One problem is that the muscles in the airways tighten up, which causes chest tightness and wheezing.
• The other problem is swelling, irritation and too much mucus in the airways.

If your child has asthma, symptoms often start after your child is exposed to a trigger. Asthma triggers can include:

• Exercise
• Allergies, such as dust, pollen, mold, or animal fur
• Something that irritates your child’s lungs, such as cold air, smoke, or strong smells like paint or perfume
• Medicines like aspirin or NSAIDs

Try to limit your child's contact with these triggers, especially in places where your child spends a lot of time, such as at home and school.

Smoking

Cigarette, pipe, and cigar smoke are harmful to children and adults in general, but the smoke is a bigger problem for children with asthma. Even the smell of smoke on clothes can trigger asthma symptoms in a child with sensitive airways. Children who live in a household with a smoker are also less likely to outgrow their asthma.

Children with asthma should not spend any time in places where there is smoke. No one should smoke in the home, and no one should smoke in a car that a child with asthma rides in.

Pollens

Pollens are small particles that plants such as trees, grasses, and weeds release into the air. The amount of pollen in the air outdoors varies with the season and the time of day. Pollen and outdoor mold amounts tend to be lower in the early morning and higher at midday and in the afternoon.

Pollens from grasses, weeds, and trees are lightweight and can be carried in the air for miles. These pollens land in the eyes, nose, and airways, causing allergies and asthma. Flower pollens are heavier and are carried from plant to plant by insects rather than the wind. As a result, flower pollens rarely cause allergies. Although it is hard to avoid pollens completely, some suggestions include:

• Keep your windows shut (especially in your child's bedroom), and use central air conditioning during pollen seasons. If a room air conditioner is used, recirculate the indoor air rather than pulling air in from outside. Air purifiers can be helpful if filters are kept clean. HEPA (high efficiency particulate air) filters are best. Wash or change air filters once a month.
• After being outside during allergy season, your child should shower and change clothes right away. Do not keep the dirty clothes in bedrooms because there may be pollen on the clothes.
• Mow the lawn often. This limits the amount of pollen released. Your child should not be in the immediate area when the lawn is being mowed.

Molds

Molds are found year-round throughout the house, outdoors, and in foods, but especially in areas of high moisture. Molds blow around in the air both outdoors and indoors. Bathrooms and damp basements are common areas for mold growth. Mold is also very likely to grow in swamp coolers, humidifiers, and the refrigerator drip pan and crisper. Here are some ways to decrease mold growth:

• Light and ventilation prevent mold growth. In the bathroom, clean the tile, floors, shower curtain, and tub thoroughly and often. Also clean under the sink. Use a cleaning solution that kills molds. For example, you can use diluted household bleach (1 cup of bleach in 10 cups of water).
• Repair leaky faucets and pipes. Try to get rid of leaks and standing water.
• Use paint rather than wallpaper on your walls. Enamel paint stops mold growth better than latex paint. An antifungal substance can be added to paints to keep mold from growing.
• It is best to keep the humidity in the house between 30 and 50%. Buy a dehumidifier to take moisture out of the air if you live in a humid climate. Dehumidifiers can help keep mold from growing in damp areas such as basements. Look for areas that get damp from hard rains and fix any leaks that you find. Empty water from and clean drip pans often.
• Avoid evaporative coolers, vaporizers, and humidifiers with a reservoir, if you can, because they are ideal places for mold and bacteria to grow. When these appliances are operating, molds and bacteria can be sprayed throughout the house. If you do use one, empty the reservoir daily, clean it with soap and water, and dry it thoroughly. The reservoir should be refilled just before use.
• Greenhouses, compost piles, and homes with many plants also frequently have molds. Cover the potting soil of houseplants with foil to reduce the spread of mold spores.

House dust

Many things are in house dust, including dirt, insect debris, dust mites, molds, animal dander, dead skin, food crumbs, and bacteria. Dust collects on every item in the home, including mattresses, couches, clothes, rugs, drapes, and stuffed animals. It is hard to avoid house dust, but the following ideas will help:

• Avoid clutter and dust catchers, particularly in the bedroom. These include knickknacks, wall decorations (pictures, pennants, and fabric wall coverings), drapes, shades or blinds, stacks of books, and piles of papers or toys.
• Give your child washable, "nonallergenic" stuffed toys when possible. For children who want to sleep with soft toys, keep only one or two soft toys in the bed, and wash them every week in hot water (at least 130° F). Store toys, dolls, and play equipment outside the bedroom or in the closet.
• Keep the bedroom closet door closed. Vacuum the closet floor often. Store only in-season clothes in the closet.
• Bare floors are best. You can replace carpet with washable, nonskid rugs. Damp mop the floors often. If you have carpet, vacuum often and thoroughly. Change vacuum cleaner filters often. Vacuum and dust early in the day to let dust settle before nap or bedtime. It is best to vacuum when your child is not home or to keep your child in another area of your home for 30 to 60 minutes after you vacuum. Be sure to clean under the furniture and in the closet.
• Mattresses should be in coverings that are allergen-proof, such as plastic. You can get allergen-proof coverings where bed linens are sold. Zippers or openings should be taped. Use only polyester pillows. Cover pillows with allergen-proof covers or wash the pillows each week in hot water. Also wash blankets, sheets, and pillowcases in very hot water (hotter than 130° F, or 54.4° C) every week. Cooler water used with detergent and bleach can also work. Avoid products made of feather, wool, kapok, or foam.
• Forced-air furnaces and air conditioners should have a dust-filtering system. Filters should be changed every 2 to 4 weeks. Filters can be cut to cover room vents if the central furnace filters are not changed every 2 weeks. Have cold and warm air ducts professionally cleaned at least every 4 to 5 years.

Pets

Allergens are found in animal saliva, dandruff, and urine. They cause allergic reactions in many people. Children may be more sensitive to one type of animal (such as cats) than another type. All furry animals can cause allergic reactions. Cold-blooded reptiles, such as snakes, turtles, lizards, and fish, do not cause problems.

If your child is sensitive to animals and has a pet, the best thing is to remove the pet from your home. Giving away a family pet is very hard, but if your child is very sensitive, it may be necessary. Once the pet is gone, thoroughly clean the house. It is especially important to clean stuffed furniture, wall surfaces, rugs, drapes, and heating and cooling systems.

If you keep a pet your child is sensitive to, the pet should live outside and NEVER be in the child's bedroom. Keep your child’s bedroom door closed. Keep pets out of family areas and rooms where children with asthma sleep at all times.

• Wash pets weekly.
• Wash hands right after any contact with a pet.
• Have non-allergic family members wash, brush, or comb pets, or clean out animal cages or litter boxes outdoors.
• Change furnace and air conditioner filters regularly.

Cockroaches

Cockroaches and their droppings are a major trigger and worsen asthma symptoms. To get rid of cockroaches:

• Keep food and garbage in containers with tight lids. Take garbage out often.
• Never leave food out. Especially keep it out of bedrooms. Do not leave out pet food or dirty food bowls.
• Vacuum or sweep the floor, wash the dishes, and wipe off countertops and the stove right after meals.
• Plug up cracks around the house to help stop cockroaches from getting in.
• Do not store paper bags, newspapers, or cardboard boxes.
• Use bait stations and other environmentally safe roach poisons. Keep these products away from children and pets.

Exercise

In exercise-induced asthma, your child may have symptoms:

• During or after physical activity and when breathing is hard, heavy, or fast
• When the air is cold
• When the humidity is very low or high
• When there is a lot of air pollution
• When there are a lot of allergens in the air

Your child does not need to avoid all exercise and other physical activities. Doing warm-up exercises before a vigorous workout may help prevent an asthma attack. Your child can usually avoid symptoms by using a quick-relief medicine 15 to 30 minutes before exercise.

Air pollution

Different types of indoor and outdoor air pollutants can aggravate asthma. This includes ozone, dust, smoke, paint fumes, and strong perfumes or odors. Weather conditions such as cold temperature and low humidity can make asthma worse, especially on high pollution days.

• Check news services for the daily pollution index and pollen count.
• Avoid unnecessary physical activity outdoors on days when the pollution index or pollen count is high.
• Avoid using a wood burning fireplace or stove, kerosene heater, or unvented gas stove or heater.
• Avoid indoor exposures to perfume, talcum powder, hair spray, air fresheners, fabric softeners, new carpet or particleboard, or other strong odors or sprays.

Sulfites

Sulfites are a food preservative found in certain foods, such as shrimp, canned tuna, dried fruit, pickles, and olives. Rarely, sulfites can cause severe asthma in some children.

Medicines

Aspirin-induced asthma is asthma triggered by taking aspirin or other nonsteroidal anti-inflammatory drugs (NSAIDs). Aspirin, ibuprofen, and naproxen are NSAIDs. This kind of asthma is not common in children.

If your child has asthma, use NSAIDs such as ibuprofen with caution. Do not give aspirin to children 18 years or younger unless told to do so by your healthcare provider. This is due to the risk of Reye's syndrome (an illness that causes inflammation of the brain and liver).

Colds and Flu

Colds and flu make asthma worse and often trigger episodes of asthma. To help prevent colds and flu:

• Try to avoid close contact with people who have a cold or the flu.
• Teach your child to wash hands before eating and when exposed to others who may have a cold or the flu.
• Make sure your child gets a yearly flu shot. This helps prevent complications of influenza for children with asthma.