Asthma is due to constriction and inflammation of the small airways. In asthma there is a special type of inflammation which narrows the small airways and makes them 'twitchy' and very sensitive to any environmental changes. The airways also become blocked with sticky mucus.During an asthma attack breathing becomes harder, even at rest. There may be a cough or wheezing.n asthma there is a special type of inflammation which narrows the small airways and makes them 'twitchy' and very sensitive to any environmental changes. The airways also become blocked with sticky mucus. During an asthma attack breathing becomes harder, even at rest. There may be a cough or wheezing.
Common reasons teens abuse drugs include: 1  Curiosity. 2  Peer pressure. 3  Stress. 4  Emotional struggles. 5  A desire to escape.
Signs of Teen Drug Abuse. There are many symptoms of drug abuse, but some of the most common signs your teen is abusing drugs are: * Problems with the law, such as DUI, breaking curfew, stealing, etc. * Problems at school, such as excessive tardiness, poor grades, suspension, etc.