RESPIRAMD LEARNING GUIDE 001
Understanding Asthma
Breathe easier through better understanding.
Asthma is a common long-term respiratory condition that causes inflammation and variable narrowing of the airways. This patient-friendly guide explains asthma symptoms, triggers, diagnosis, spirometry, inhalers, treatment, warning signs and everyday control.
• 12–15 minute overview
• Consultant pulmonologist
• Free patient resource
• Medically reviewed
• Updated July 2026
Quick Answer
What Is Asthma?
Asthma is a common long-term respiratory condition that causes inflammation and variable narrowing of the airways. It is often characterized by episodes of airway sensitivity, leading to recurring symptoms such as coughing, wheezing, and shortness of breath. While the exact causes are complex, asthma involves a combination of genetic factors and environmental triggers that affect pulmonary function.
Asthma is not contagious. It is manageable, and many people with well-controlled asthma live full, active lives.
Why You May Be Reading This
You or a family member have a new diagnosis of asthma.
You are experiencing asthma symptoms like chest tightness.
You want to understand your asthma triggers better.
You are looking for ways to improve asthma control.
You need clarity on asthma test results and inhalers.
How Does Asthma Affect Your Airways?
- Inflammation: The lining of the bronchial tubes becomes red, swollen, and hypersensitive to environmental factors.
- Bronchoconstriction: The muscles encircling the airways tighten during a flare-up, significantly narrowing the passage for air.
- Mucus Hypersecretion: The body produces excess thick mucus, which can further clog the narrowed airways and trigger coughing.
Asthma involves ongoing airway inflammation. Even when you feel no symptoms, this underlying inflammation can persist. Effective asthma treatment aims to minimize this inflammation and prevent long-term airway remodeling or scarring.
Common Asthma Symptoms
Common symptoms
- Persistent coughing, especially at night or early morning.
- Shortness of breath (feeling like you cannot get enough air).
- Chest tightness, pressure, or a squeezing sensation.
- Wheezing, especially during exhalation.
- Increased sputum (mucus) production.
Seek Urgent Medical Help If You Have:
- Rapidly worsening shortness of breath or audible wheezing.
- No symptom relief after using a rescue/quick-relief inhaler.
- Inability to speak in full sentences due to breathlessness.
- Straining chest muscles to breathe.
- Blue or gray tint to the lips, face, or fingernails.
Do not wait for an online review if you may be having a severe asthma attack. Contact local emergency services or attend an emergency department immediately.
What Can Trigger Asthma?
Asthma triggers differ for every person. Most triggers cause the airways to tighten and become inflamed. While the exact asthma causes are not fully understood, an inherited tendency toward allergies and environmental exposures often play a key role.
Allergens
Common allergens include pollen, dust mites, pet dander, mold, and cockroaches.
Environmental Irritants
Tobacco smoke, wood smoke, strong odors (perfumes), chemical fumes, and industrial air pollution.
Weather Patterns
Exposure to cold and dry air, sudden changes in temperature, or high humidity can provoke symptoms.
Physical Exercise
Exercise-induced bronchoconstriction occurs when physical activity triggers airway narrowing during or after exertion.
Infections
The common cold, influenza, and sinus infections are among the most frequent asthma flare-up triggers.
Strong Emotions
Intense laughing, crying, shouting, or emotional stress can trigger changes in breathing and airway response.
Trigger management should be individualized. Avoid unnecessary restrictions when there is no clear clinical link between a specific exposure and your symptoms.
How Is Asthma Diagnosed?
A formal diagnosis of asthma is built on a careful review of your clinical history, physical examination, and objective evidence of variable airflow obstruction. It is not diagnosed with a single blood test or X-ray.
Spirometry
A fundamental lung function test that measures how much and how fast you can exhale.
Bronchodilator Reversibility
Testing if airway obstruction improves significantly after using a reliever inhaler.
Important Note: A normal spirometry result when you are feeling well does not exclude asthma. Because asthma symptoms vary, diagnostic tests may need to be repeated during a flare-up or after exercise.
Understanding Your Spirometry Report
Spirometry is the most common lung function test used to detect airway obstruction. Your report usually shows your actual measurement alongside a 'predicted' value for someone of your age, height, and gender.
Measure
FEV1
What It Means
Forced Expiratory Volume in 1 second. The amount of air you can blow out in the first second.
Asthma Treatment Options
While there is no cure for asthma, modern medicine allows for excellent control of symptoms. The primary aim of treatment is to reduce inflammation, prevent flare-ups, and allow you to live an active life without restriction.
Regular Preventer Use
Inhaled corticosteroids (ICS) are the cornerstone of treatment, targeting the underlying inflammation.
Warning: Never stop prescribed inhaled or oral corticosteroid treatment suddenly without medical advice. Sudden discontinuation can lead to severe asthma flare-ups and dangerous systemic withdrawal effects.
Inhalers and Your Asthma Action Plan
Good Inhaler Technique
- Remove the cap and shake the inhaler well.
- Breathe out fully away from the inhaler.
- Place the mouthpiece between your teeth and seal your lips.
- Press the canister once while starting to breathe in slowly and deeply.
- Hold your breath for 10 seconds to allow medication to reach small airways.
- Wait 30-60 seconds if a second puff is prescribed.
Asthma Action Plan
Green Zone (Everyday): You feel well, have no cough or wheeze, and can sleep through the night. Continue using your preventer inhaler as prescribed.
Yellow Zone (Caution): You have some symptoms, chest tightness, or need your reliever inhaler more often. Follow your plan to increase doses as advised by your doctor.
Red Zone (Medical Alert): Symptoms are getting worse quickly, or the reliever is not helping for long. Seek urgent medical attention immediately.
Living Well With Asthma
- Take your preventer inhaler exactly as prescribed, even when feeling well.
- Always carry your reliever (blue) inhaler with you.
- Know your personal asthma triggers and learn how to manage them.
- Check your peak flow regularly if advised by your pulmonologist.
- Ensure your inhaler technique is reviewed annually by a professional.
- Maintain a healthy weight and stay physically active.
- Get an annual flu vaccination to protect your respiratory health.
Good asthma control should allow most people to live active, healthy and fulfilling lives.
When Should You See a Pulmonologist?
- Your asthma symptoms are not controlled despite regular inhaler use.
- You frequently suffer from asthma flare-ups or 'attacks'.
- You have been admitted to the hospital due to asthma.
- The diagnosis of asthma is unclear or you have atypical symptoms.
- You require high doses of steroid tablets for symptom control.
- You need a specialist review of your spirometry or lung function reports.
Frequently Asked Questions About Asthma
Frequently asked questions
FREE RESPIRAMD PATIENT RESOURCE
Read the Complete Illustrated Guide
Our comprehensive asthma guide provides 16 pages of specialist-reviewed information, diagrams, and actionable advice to help you manage your condition with confidence.
- RespiraMD Learning Guide 001
- 16 illustrated pages
- Reviewed by Dr. Saif Ur Rahman
- Consultant Pulmonologist
- Version 1.0 | July 2026
Medically Reviewed by
Dr. Saif Ur Rahman
Dr. Saif Ur Rahman, MD
Consultant Pulmonologist | Member of ERS & ATS
Dr. Saif is a dedicated respiratory specialist focused on complex airway diseases and clinical education. With over 15 years of experience in pulmonology, he ensures all RespiraMD resources are accurate and evidence-based.
Medical Disclaimer: The information provided on this page is for educational purposes only. It is not intended as a substitute for professional medical advice. Always seek the advice of your physician. If you are experiencing a medical emergency, contact your local emergency services immediately.