Asthma is not a disease in itself, but a symptom of some other condition. A person, suffering from asthma, finds it hard to breathe because there is an obstruction to the flow of air in and out of the lungs.
Asthma may be due to allergy, and emotional disturbance or atmospheric condition.
A person developing asthma before he is 30 years old is due to an allergy, being sensitive to dust, animals, pollens, etc. Children generally develop asthma from food allergies.
Often, these are caused by eggs, milk or wheat products. People suffering from asthma follow a special diet to eliminate or minimize contact with products causing asthma.
Below Asthma info from Wikipedia (Read More):-
Asthma is a predisposition to chronic inflammation of the lungs in which the airways (bronchi) are reversibly narrowed. Asthma affects 7% of the population,[1][2] and 300 million worldwide.[3] During asthma attacks (exacerbations of asthma), the smooth muscle cells in the bronchi constrict, and the airways become inflamed and swollen. Breathing becomes difficult, and asthma causes 4,000 deaths a year in the U.S. Attacks can be prevented by avoiding triggering factors and by drug treatment. Drugs are used for acute attacks, commonly inhaled beta-2 agonists. In more serious cases, drugs are used for long-term prevention, starting with inhaled corticosteroids, and then long-acting β2-agonists if necessary. Leukotriene antagonists are less effective than corticosteroids but have no side effects. Monoclonal antibodies such as mepolizumab and omalizumab are sometimes effective. Prognosis is good with treatment.
http://en.wikipedia.org/wiki/Asthma
