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.
The most commonly used illegal drugs are marijuana (pot), stimulants (cocaine, crack, and speed), LSD, PCP, opiates, heroin, and designer drugs (Ecstasy). The use of illegal drugs is increasing, especially among young teens. The average age of first marijuana use is 14, and alcohol use can start before age 12. The use of marijuana and alcohol in high school has become common. Drug use is associated with a variety of negative consequences, including increased risk of serious drug use later in life, school failure, and poor judgment which may put teens at risk for accidents, violence, unplanned and unsafe sex, and suicide.