Peak Flow Exercise Spacers Asthma Action Plan Visiting your doctor . As we breathe, air moves in and out of the lungs through branching airways. The muscle around the airway tightens.
Extra mucus is produced.
We don't really know why some people have extra sensitive airways and others don't, but we do know that many people are born with a tendency to develop asthma. There is often a history of asthma, eczma or hayfever in brothers, sisters and parents or close relatives. Asthma can occur for the first time at any age. There is also evidence that exposure to certain things, for example cigarette smoke during pregnancy and early childhood, increases the risk of developing asthma. . Wheezing - a high pitched raspy sound on breathing Coughing Shortness of breath Tightness in the chest These symptoms vary from person to person, and from time to time within the same person.