India, May 7 -- Asthma is a chronic respiratory illness that can get triggered by dust, pollens and other allergens. Allergic asthma is the condition in which asthma attacks specifically get precipitated by allergen exposure. Also read | Is asthma infectious? Doctor reveals 7 surprising facts about asthma you may not know

In an interview with HT lifestyle, Dr Ravi Shekhar Jha, director, pulmonology, Fortis Hospital, Faridabad said, "It is the most common type of asthma and usually occurs in those with a history of allergies. This condition develops when the immune system overreacts to otherwise innocuous environmental substances, leading to airway inflammation and constriction."

Allergic asthma is also caused mostly by allergens, substa...