Causes of asthma

Causes of Asthma

Asthma is chronic inflammation of the airways - the small tubes carrying air in and out of the lungs become swollen, twitchy and prone to narrowing. Why one person develops it and another does not comes down to a mix of genes and environment, and understanding your personal triggers is half of treatment. For an overview of the condition itself, see NHS guidance on asthma.

Why Airways Become Asthmatic

In asthma, the airway lining is persistently inflamed even between attacks. When a trigger hits, three things happen at once: the muscles around the airways squeeze tight (bronchospasm), the inflamed lining swells further, and sticky mucus floods the tube. Air - especially outgoing air - gets trapped, producing the wheeze, tightness and breathlessness of an attack.

The Root Causes: Genes Meet Environment

• Family tendency (atopy): asthma runs with eczema, hay fever and food allergies in families; a child with one atopic parent has a markedly higher risk
• Early-life exposures: respiratory infections in infancy, exposure to tobacco smoke in the womb or childhood, air pollution, and premature birth all raise risk
• Allergic sensitisation: house dust mites, pollen, moulds, animal dander and cockroach proteins sensitise the airways over years
• Occupational exposure: workplace dusts, fumes and chemicals (flour, isocyanates, welding fumes, cleaning agents) can cause adult-onset asthma
• Obesity and hormonal factors: both are linked to developing and worsening asthma, particularly in adult women

The Triggers That Set Off Attacks

Triggers are not the root cause - they ignite an already-inflamed airway:

• Dust, smoke and air pollution - including cooking smoke, incense and mosquito coils, which matter greatly in Indian homes
• Cold air, weather changes and the monsoon - dampness grows moulds; cold dry air irritates airways directly
• Respiratory infections - colds and flu are the commonest trigger of serious flare-ups
• Allergens - dust mites, pollen, mould, pets
• Exercise - especially in cold or polluted air (manageable, not a reason to stop exercising)
• Strong emotions, stress and laughter - through changed breathing patterns
• Certain medicines - NSAID painkillers like aspirin and ibuprofen, and some beta-blockers, can provoke attacks in susceptible people
• Reflux (GERD) - acid rising at night can irritate airways

The Ayurvedic Perspective

Classical texts describe asthma as Tamaka Shwasa, arising when aggravated Vata, obstructed by sticky Kapha, turns upward in the respiratory channels (Pranavaha Srotas) - Charaka Samhita, Chikitsa Sthana 17; Madhava Nidana, Chapter 12. Their trigger list is strikingly modern: dust (Raja), smoke (Dhuma), cold wind, damp places, heavy and cold foods, suppressing natural urges, overexertion, and neglect of chronic cough or fever. Two thousand years later, dust, smoke, cold air and untreated respiratory illness remain on the list.

Frequently Asked Questions

Did I get asthma because of pollution? Pollution raises risk and worsens existing asthma, but it is usually one factor among several - genetics, early infections and allergen exposure also contribute. Whatever the mix in your case, trigger control still helps everyone.

Can adults suddenly develop asthma? Yes. Adult-onset asthma is common, especially after respiratory infections, with occupational exposures, in obesity, or around hormonal changes. New breathlessness and wheeze at any age deserve evaluation, not dismissal.

Is asthma caused by stress? Stress does not cause the underlying airway inflammation, but it reliably worsens control and can trigger attacks. Treating asthma well means managing both the airways and the load on them.

Why is my asthma worse in the monsoon? Dampness multiplies mould spores and dust mites, viral infections circulate, and weather shifts irritate airways. The classical texts noted the same pattern - attacks worsening in cloudy, rainy weather.