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Asthma Causes: Understanding the Triggers

Discover the common triggers and underlying causes of asthma. Learn how to identify what makes your asthma worse, from allergens and irritants to exercise and stress, to better manage your condition.

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Written by Dr. Mohammed Kamran

Reviewed by Dr. J T Hema Pratima MBBS

Last updated on 19th Aug, 2025

Asthma is a common but serious respiratory condition that affects millions of people worldwide. If you or a loved one has asthma, you know how frightening it can be when breathing becomes difficult. Understanding what causes asthma and its triggers can help you manage the condition better and reduce flareups.

In this article, we’ll explore the common causes and triggers of asthma, how they affect your health, and practical tips to minimize exposure. Let’s dive in!

What Is Asthma?

Asthma is a chronic lung disease that causes inflammation and narrowing of the airways, making breathing difficult. Common symptoms include:

  • Wheezing (a whistling sound while breathing)

  •  Shortness of breath

  •  Chest tightness

  •  Persistent coughing (especially at night or early morning)

While asthma cannot be cured, it can be controlled with proper treatment and lifestyle adjustments.

What Causes Asthma?

The exact cause of asthma is not fully understood, but research suggests that a combination of genetic and environmental factors play a role. Some people are born with a higher risk of developing asthma due to family history, while others develop it due to exposure to certain triggers.

1. Genetic Factors

  •  If one or both parents have asthma, their children are more likely to develop it.

  •  People with allergies (like eczema or hay fever) are also at higher risk.

2. Environmental Factors

Exposure to certain substances early in life may increase asthma risk, including:

  •  Air pollution

  •  Tobacco smoke (especially during pregnancy or childhood)

  •  Respiratory infections in infancy

  •  Exposure to allergens like dust mites, pet dander, or pollen

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Common Asthma Triggers

Asthma triggers vary from person to person. Identifying and avoiding your specific triggers can help prevent asthma attacks. Here are some of the most common ones:

1. Allergens

  •  Dust mites – Tiny bugs found in bedding, carpets, and upholstery.

  •  Pollen – From trees, grasses, and weeds.

  •  Pet dander – Skin flakes, saliva, or urine from cats, dogs, or other pets.

  •  Mold – Thrives in damp areas like bathrooms and basements.

How to reduce exposure:

  •  Use allergenproof mattress and pillow covers.

  •  Wash bedding weekly in hot water.

  •  Keep pets out of the bedroom.

  •  Use a dehumidifier to prevent mold growth.

2. Respiratory Infections

Colds, flu, and sinus infections can worsen asthma symptoms.

Prevention tips:

  •  Wash hands frequently.

  •  Get vaccinated for flu and pneumonia (if recommended by your doctor).

  •  Avoid close contact with sick people.

3. Air Pollution & Irritants

  •  Smoke (cigarettes, woodburning stoves, wildfires)

  •  Strong odors (perfumes, cleaning products, paint fumes)

  •  Vehicle exhaust and industrial fumes

How to protect yourself:

  •  Avoid smoking and secondhand smoke.

  •  Use fragrancefree cleaning products.

  •  Stay indoors on high pollution days.

 4. Physical Activity (ExerciseInduced Asthma)

Some people experience asthma symptoms during or after exercise.

Management tips:

  •  Warm up before exercising.

  •  Use a quick relief inhaler before activity (as prescribed).

  •  Choose indoor exercises on cold or high-pollen days.

5. Weather Changes

Cold, dry air or sudden weather shifts can trigger asthma.

What to do:

  •  Cover your nose and mouth with a scarf in cold weather.

  •  Stay indoors during extreme weather conditions.

 6. Stress & Strong Emotions

Anxiety, crying, or laughing hard can sometimes trigger asthma.

Coping strategies:

  •  Practice deep breathing or meditation.

  •  Get enough sleep to reduce stress.

7. Certain Medications

Some medicines (like aspirin, ibuprofen, or beta blockers) may worsen asthma in some people.

Always check with your doctor before taking new medications.

How Asthma Affects Your Health?

Uncontrolled asthma can lead to:

  •  Frequent asthma attacks, requiring emergency care.

  •  Poor sleep due to nighttime coughing.

  •  Reduced physical activity, affecting overall fitness.

  •  Long-term lung damage in severe cases.

The good news? With proper management, most people with asthma can lead active, healthy lives!

Tips for Managing Asthma

These are the following tips for managing asthma:

1. Follow Your Asthma Action Plan – Work with your doctor to create a personalized plan.

2. Take Medications as Prescribed – Use controller inhalers daily and keep a rescue inhaler handy.

3. Monitor Your Symptoms – Use a peak flow meter to track lung function.

4. Avoid Triggers – Identify and minimize exposure to your specific triggers.

5. Stay Active Safely – Exercise is important; just take precautions.

6. Get Regular Checkups – Visit your doctor to adjust treatment if needed.

When to See a Doctor?

Consult a healthcare provider if:

  •  Your symptoms worsen or become more frequent.

  •  You’re using your rescue inhaler more than twice a week.

  •  Asthma disrupts your daily activities or sleep.

If you need expert advice, you can book a consultation with an asthma specialist through Apollo 24|7. Early diagnosis and treatment can make a big difference!

Final Thoughts

Asthma doesn’t have to control your life. By understanding its causes and triggers, you can take proactive steps to stay healthy. Remember, small changes—like keeping your home allergen free or using medications correctly—can significantly improve your quality of life.

If you suspect asthma or need help managing it, don’t hesitate to reach out to a healthcare professional. Apollo 24|7 offers convenient online consultations and diagnostic tests to support your respiratory health.

Stay informed, stay prepared, and breathe easy! 

Consult Top Specialists

Dr. Ashwani Kumar, Ent Specialist

Dr. Ashwani Kumar

Ent Specialist

11 Years • MBBS, DNB (Otorhinolaryngology)

Delhi

Apollo Hospitals Indraprastha, Delhi

recommendation

98%

(25+ Patients)

1200

150 Cashback

1500

No Booking Fees

Dr. Safina Kauser, Ent Specialist

Dr. Safina Kauser

Ent Specialist

7 Years • MBBS, MS

Bengaluru

Apollo Clinic, JP nagar, Bengaluru

800

120 Cashback

800

No Booking Fees

Dr. Ravichandar L, Ent Specialist

Dr. Ravichandar L

Ent Specialist

34 Years • MBBS, M.S in Otolaryngology

Bengaluru

Apollo Clinic, Indiranagar, Bengaluru

800

120 Cashback

800

No Booking Fees

Dr. Aijaz Muzamil, Ent Specialist

Dr. Aijaz Muzamil

Ent Specialist

46 Years • MBBS, Ms ENT

Bengaluru

Apollo Clinic, Sarjapur Road, Bengaluru

800

120 Cashback

Consult Top Specialists

Dr. Ashwani Kumar, Ent Specialist

Dr. Ashwani Kumar

Ent Specialist

11 Years • MBBS, DNB (Otorhinolaryngology)

Delhi

Apollo Hospitals Indraprastha, Delhi

recommendation

98%

(25+ Patients)

1200

150 Cashback

1500

No Booking Fees

Dr. Safina Kauser, Ent Specialist

Dr. Safina Kauser

Ent Specialist

7 Years • MBBS, MS

Bengaluru

Apollo Clinic, JP nagar, Bengaluru

800

120 Cashback

800

No Booking Fees

Dr. Ravichandar L, Ent Specialist

Dr. Ravichandar L

Ent Specialist

34 Years • MBBS, M.S in Otolaryngology

Bengaluru

Apollo Clinic, Indiranagar, Bengaluru

800

120 Cashback

800

No Booking Fees

Dr. Puja Chatterjee, Ent Specialist

Dr. Puja Chatterjee

Ent Specialist

7 Years • MBBS, MS (AIIMS, Delhi), DNB, MRCS-ENT (Royal College of Surgeons, England)

Bengaluru

Apollo Clinic, JP nagar, Bengaluru

500

75 Cashback

Dr. Aijaz Muzamil, Ent Specialist

Dr. Aijaz Muzamil

Ent Specialist

46 Years • MBBS, Ms ENT

Bengaluru

Apollo Clinic, Sarjapur Road, Bengaluru

800

120 Cashback

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