Which of the following is a common symptom of asthma?

Wheezing is a common symptom of asthma that occurs due to the narrowing of the airways, which can happen during an asthma attack. It is characterized by a high-pitched whistling sound that is most often heard during exhalation. This occurs when air passes through constricted bronchial tubes and is a key indicator that the airways are inflamed or obstructed, leading to difficulty in breathing. Recognizing wheezing is important for diagnosing asthma and assessing the severity of the condition during an attack or periodic assessment.

Although other options like nausea, fatigue, and headaches may occasionally be experienced by individuals with asthma, they are not recognized as primary symptoms of the condition. Fatigue may result from the effort of breathing or lack of sleep due to nighttime symptoms, and headaches might relate to factors like medication side effects or sinus issues, but these are not direct symptoms of asthma itself. Understanding the hallmark symptoms of asthma, such as wheezing, helps in effective management and treatment of the disease.