Asthma is a chronic inflammation of the bronchial tubes and lungs. This causes the air passages to narrow periodically resulting in breathing difficulties.
According to Ayurveda, it is an aggravation of Kapha and Vata humor. Asthma is a fall out of wrong, improper dietary habits and the accumulation of toxins.
Excess exposure to heat or cold, change in weather, certain types of cosmetic products and perfumes, cigarette, pollution etc. are known to cause asthma apart from psychological factors and hereditary factors.