What may cause asthma?

• Inhaled allergens such as house dust mites, animal dander, pollen, grasses, mould spores;
• Irritant gases, ie cigarette smoke;
• Ingested allergens: Studies (see references) have indicated that food allergies play an important role in asthma and hayfever (the main culprits include dairy, wheat, eggs, yeast, chololate, nuts and fish), drugs (most common are penicillin and other antibiotics, aspirin and certain non-steroidal anti-inflammatory drugs), additives, colourings (E102 tartazine is very common in children), preservatives such as the benzoates E210–219 and metabisulphites E220–227, yeast and moulds on food, household chemicals;
• Temperature changes (especially cold weather which constrict the bronchioles);
• Emotional stress. >>>
  

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