Which of the following is a common symptom of dyspnea?

Dyspnea refers to the sensation of shortness of breath or difficulty in breathing. It is often described as a feeling of not getting enough air, and individuals experiencing dyspnea may find it challenging to breathe normally. This symptom can arise from various underlying conditions, such as respiratory diseases, cardiovascular problems, or anxiety.

The other symptoms listed—difficulty swallowing, chest pain, and abdominal discomfort—are associated with different medical issues and are not specifically indicative of dyspnea. While they may coexist with dyspnea in certain clinical scenarios, they do not represent the hallmark symptom of this condition. Hence, the most accurate answer in relation to the question about common symptoms of dyspnea is the difficulty breathing.