Dyspnea or dyspnoea (pronounced disp-nee-ah, IPA /dɪsp'niə/), from Latin dyspnoea, from Greek dyspnoia from dyspnoos, shortness of breath) or shortness of breath (SOB) is perceived to be difficulty of breathing or painful breathing. It is a common symptom of numerous medical disorders. Dyspnea on exertion (DOE or exertional dyspnea) indicates dyspnea that occurs (or worsens) during physical activity. Disorders of the lungs Obstructive lung diseases Asthma Bronchitis Chronic obs… (More on Dyspnea)