Air Pollution

Overview

Air pollution is the presence of harmful substances in the air we breathe. These substances can enter your body through your nose and lungs, causing a range of health issues, from minor irritation to serious heart and lung problems.

Air pollution is common worldwide. In many areas, everyday activities like driving, heating homes, and farming all contribute to poor air quality.

Everyone can be affected by air pollution. It is especially important for babies, children, older adults, and those with conditions like asthma, heart disease, or diabetes to limit their exposure.

Symptoms

Common symptoms

• Coughing
• Wheezing or whistling sound when breathing
• Shortness of breath
• Chest tightness
• Irritated eyes, nose, or throat
• Headaches
• Fatigue or tiredness

Symptoms in children

• Faster breathing or noisy breathing
• Coughing at night
• Chest colds that seem to linger
• Symptoms of asthma, such as wheezing or coughing

Symptoms in older adults

• Chest pain or pressure
• Shortness of breath
• Dizziness or confusion
• Unexplained tiredness

Causes

Main causes

• Vehicle exhaust from cars, buses, and trucks
• Smoke from factories and power plants
• Smoke from wildfires, burning leaves, or waste
• Burning wood, coal, or kerosene for heating and cooking
• Dust from construction, roads, and agriculture
• Chemical pollution from solvents and cleaners

Risk factors

• Living in a busy city or near highways or industrial plants
• Having asthma, COPD, or heart disease
• Working outdoors or on busy roads
• Smoking or being around smokers
• Spending time outdoors when air pollution levels are high
• Being in areas where there is wildfire smoke

When to see a doctor

See a doctor urgently if:

• You have chest pain, severe shortness of breath, or your usual medicines are not helping
• You faint, feel confused, or have a hard time speaking

Book a routine appointment if:

• You have a cough, wheezing, or tiredness that keeps coming back
• You want help to manage an existing condition like asthma or COPD
• You are concerned about how air pollution may be affecting your health

Diagnosis

Air pollution itself is not diagnosed. Instead, your doctor will listen to your symptoms and ask about your daily exposure. They may check how well your lungs are working and look for any other conditions that could be causing your symptoms.

Tests that may be done

• A breathing test called spirometry to check lung function
• A pulse oximeter to measure your blood oxygen level
• A peak flow meter to see how quickly you can blow out air
• A chest X-ray if your doctor suspects a lung infection or heart problem

What to expect at your appointment

Your doctor will ask you questions and may perform a physical exam. They may also review the current air quality in your area and suggest ways to reduce your exposure. You may get a follow-up plan, especially if you have asthma.

Treatment

There is no pill that cures air pollution. Treatment focuses on protecting your body from its effects and managing any symptoms you already have. For people with asthma or other conditions, following a careful plan is key.

Self-care at home

• Check air quality forecasts and plan your day
• On high pollution days, stay indoors and keep windows closed
• Use an air purifier with a HEPA filter if possible
• Avoid heavy exercise near busy roads
• Wear a high-quality face mask during smoke events
• Do not smoke and avoid secondhand smoke

Medical treatments

Your doctor may suggest medicines to help open your airways or reduce inflammation in your lungs. Some people need regular inhalers to keep symptoms under control. Others may only need relief medicines to use during a flare-up. If your symptoms are severe, hospital care with oxygen or breathing treatments may be needed.

Living with this condition

Living with air pollution is about planning and paying attention. On good air days, enjoy the outdoors. On bad air days, adjust your routine to put less strain on your lungs and heart.

Lifestyle tips

• Learn your local air quality index (AQI) and what it means for you
• Keep windows closed during high pollution events and use fans or air conditioning
• Exercise indoors or in green spaces away from main roads when possible
• Carry any prescribed rescue medicines with you
• Make a simple action plan with your doctor for days when symptoms spike

Diet and exercise

A balanced diet with plenty of fruits, vegetables, and whole grains supports your body's ability to fight inflammation. Gentle exercise is good, but tune into how you feel and take it easier when the air is poor. Indoor swimming or gym sessions can be a good alternative.

Mental health and emotional wellbeing

It is natural to feel anxious about how air pollution affects your health. Focus on what you can control, and talk about your worries with someone you trust. If stress becomes overwhelming, speak to a mental health professional.

Prevention

You cannot prevent air pollution itself, but you can reduce its impact on your health. Simple choices like avoiding rush hour traffic, choosing cleaner transport, and supporting clean energy in your community all help.

Vaccines

Staying up to date on recommended vaccines, such as the flu vaccine and pneumonia vaccine, can help prevent lung infections that are harder to fight when air pollution is high.

Complications

If left untreated

• Asthma attacks and worsening of existing lung disease
• Increased risk of heart attacks and strokes
• Long-term damage to the lungs, leading to COPD
• Higher chance of lung cancer with long-term exposure
• In pregnancy, a higher risk of low birth weight or early delivery

Long-term outlook

Most people recover quickly from short-term exposure once they move to cleaner air. With good planning, the right medical care, and community efforts to reduce pollution, you can protect your health and still enjoy a vital, active life.

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