Asthma Asthma is a condition of the bronchial tubes characterized by episodes of constriction and increased mucous production. A person with asthma has bronchial tubes that are super sensitive to various stimuli, or triggers, that can produce asthma symptom. In other words, asthmatics have special sensitivity that causes their lung tissue to react far more than is should to various stimulating factors or triggers. For this reason, people with asthma are said to have "twitchy airways." Some symptoms that people with asthma commonly experience are chest tightenings, difficulty inhaling and exhaling, wheezing, production of l