What is the cause of asthma

Asthma is an allergic reaction that occurs when your child inhales allergens like pollen, dust, feathers or fungal spores. The allergy affects the lining of the air passage. The child begins to wheeze and her immunity to infection is reduced. When she has an asthma attack, the lining of the air passages goes into spasm and large amounts of mucus are secreted. Your child will find it difficult to breathe. She may become pale and her lips might turn blue.