Air pollution may worsen asthma symptoms and trigger asthma attacks. Exposure to air pollution when their mother was pregnant and in childhood may also increase a person’s risk of developing asthma. Monitoring air pollution levels can help asthmatics avoid health effects.
People with asthma have airways that are sensitive to various substances, or triggers, in the air. Air pollution and other airborne irritants are among the most common asthma triggers.
Air pollution is the presence of pollutants in the air that are hazardous to humans and other living things.
This article explores how air pollution affects asthma and what people with asthma should know about air pollution.
It can lead to tissue damage, such as from inflammation and hyperresponsiveness, in a person’s airways. Airway hyperresponsiveness is when a person’s airways are more sensitive to stimuli, such as pollutants, and narrow too much in response.
Ozone, a common air pollutant, triggers asthma attacks and makes it difficult to breathe deeply, as well as reducing lung function.
Table of Contents
Does air pollution cause people to develop asthma?
The effects of oxidative stress due to air pollution
Exposure to traffic-related air pollution (TRAP), particularly during the second trimester of pregnancy, also has links with an
Childhood exposure to TRAP also increases the risk of asthma. A 2020 study found that exposure to air pollution early in life increased a person’s risk of developing asthma from childhood to early adulthood.
A mother’s exposure to secondhand smoke and maternal smoking may also increase an unborn infant’s risk of developing asthma, but genetic predisposition can also play a role.
The types of air pollutants that can affect asthma are
Particulate matter (PM2.5) consists of tiny particles of solids and liquids in the air. These particles
Fine PM2.5 particles
Larger (coarse) particulate matter mainly deposits in the upper airways. Examples are organic debris from soil, road dust and metals, and roadway particles such as brake wear.
A 2017 study found that those with exposure to coarse particulate matter were more likely to develop asthma and need hospitalization or emergency visits.
Researchers have conducted numerous studies on the association between air pollution and asthma.
A 2017 study found that exposure to specific components of TRAP had a positive association with asthma onset.
Findings from a
The American Lung Association advises people to take the following steps:
- Check for daily air pollution forecasts in TV weather reports, radio, online, and in newspapers.
- Avoid going outdoors when air pollution is high.
- Avoid exercising near high-traffic areas.
- Use less energy in the home because generating electricity and other energy sources creates air pollution.
- Look for alternatives to driving a car, such as using public transportation, carpooling, walking, or riding a bike.
- Do not burn trash or wood.
- Keep public places tobacco-free, and do not smoke indoors.
People with asthma can speak with a healthcare professional about the possibility of increasing their medication when air pollution is high. A person can include this in their own or their children’s asthma action plan.
A person should contact a healthcare professional immediately if they experience:
- feeling faint, weak, or dizzy
- finding it challenging to perform their usual routines
- a cough that does not go away
- wheezing, especially if it is different from their usual breathing pattern
- wheezing that does not get better even after taking medications
Here are some common questions about air pollution and asthma.
Which climate is worst for asthma?
Extreme weather and sudden weather changes can irritate the airways. Some types of weather that can trigger asthma symptoms are:
What are the potential sources of indoor air pollution?
There are many potential sources of indoor air pollution. They typically release gas or particles and include:
- tobacco products
- building materials and furnishings, such as flooring, upholstery, or insulation containing asbestos
- humidification devices and central cooling and heating systems
- personal care and hobby products
- household cleaning products
- excess moisture
- outdoor pollution, such as pesticides and radon
Air pollution is a significant contributor to the development of asthma. It can also trigger and worsen symptoms in people with asthma.
It is vital for people with asthma to stay informed of air pollution levels and take necessary precautions to avoid triggering asthma attacks.
They should also talk with a healthcare professional if they experience any signs that their asthma is worsening.