Today, as the pollution is getting worse, many children have asthma.  We need to learn more about this disease.  What are the spark factors of asthma in children?

Well, the emotion obstruction can cause constringency respiratory channel. The other factor is the allergy factor. Today, there are so many proofs about it.  Allergy is one of the most important factors that make asthma grow. Atopi is real risk factors that can cause appear of asthma symptom.

While the non-allergy factors are virus infection or bacterial and substances of irritant/pollutant.