Dyspnoea is an important and common symptom in patients with pulmonary or cardiovascular disease. It is a vital signal that we all can experience, for instance during heavy exercise, but it can also be an expression of a variety of diseases. In this updated educational article, we provide an answer to 10 questions on the causes of dyspnoea and the effectiveness of various diagnostic and therapeutic strategies. We propose a strategy to assess dyspnoea in clinical practice. Key points are determining the severity of the problem, forming a differential diagnosis, thinking about the mechanism of dyspnoea and intervening in a timely manner. We conclude that the assessment and treatment of dyspnoea often requires a multidisciplinary approach.