Shortness of Breath: What It Means and When to Seek Help

Shortness of breath — medically called dyspnoea — is the uncomfortable sensation of not being able to breathe easily or deeply enough. It can feel like air hunger, chest tightness, or a feeling of suffocation. It is one of the most common reasons people visit emergency departments worldwide, and in Korea, major hospital emergency departments and private urgent care clinics are well-equipped to assess and treat respiratory distress.

The causes of dyspnoea are wide-ranging. Respiratory causes include asthma, chronic obstructive pulmonary disease (COPD), pneumonia, and pulmonary embolism. Cardiac causes include heart failure, arrhythmias, and heart attack. Anaemia, anxiety, obesity, and physical deconditioning are also common contributors. In Korea, seasonal fine dust (미세먼지) and ultrafine dust (초미세먼지), particularly in spring, can trigger or worsen breathlessness, especially in people with pre-existing heart or lung conditions.

Most episodes of mild breathlessness during vigorous exercise are normal. However, breathlessness at rest, when lying flat, with associated chest pain, or that appears suddenly should be treated as a potential emergency. Korea's Emergency Medical Services — reachable on 119 — provide rapid response and oxygen therapy. Residents with recurrent breathlessness should see a cardiologist or pulmonologist for full assessment, including ECG, chest X-ray, spirometry, and echocardiogram if indicated.