The cough is called dry when it is not productive, more precisely in the absence of expectoration of mucus. It is sometimes exhausting in that the patient cannot be relieved by the release of his bronchi.
Acute, it is often linked to an irritating cause, sometimes ENT (rhinitis, sinusitis, angina), acute pulmonary edema, pleurisy, the presence of an inhaled foreign body (think about it in children). Chronic, it is linked to asthma (often nocturnal or exercise), whooping cough, interstitial pneumonitis, sarcoidosis, gastroesophageal reflux, bronchial cancer or ENT, a drug (some antihypertensive). An initially dry cough sometimes turns into a wet cough.