WHAT IS A TRIGGER FACTOR?
Symptoms of asthma may be precipitated or exacerbated by various factors, which are called the “triggers”. They include respiratory infection (mainly viral and occasionally fungal or bacterial), industrial irritant fumes, automobile exhaust fumes, weather charges, humidity and passive smoking. Endocrinal and emotional factors do playa role apart from hypersensitivity to drugs like aspirin and NSAID (non steroidal anti-inflammatory drugs) in some children.
