Asthma causes wheezing, coughing, and shortness of breath.
Asthma is more common in children than adults. People who had asthma in childhood may not have it when they are adults. Or it may come back later in life. Others may have asthma for the first time in mid- or late life. When you breathe in something you are allergic to, such as dust pollen, mold, or animal dander.