Possible causes, alone or in conjunction, that produce the<unk>  include the following. * Postnasal drip, when excess mucus is produced in the sinus of the nose and drips back towards the throat, causes a cough reflex, also known as upper airway cough syndrome. Postnasal drip coughing can be caused by the direct irritation of the postnasal drip or by inflammation of cough receptors in the upper airway. Postnasal drip cases contribute 34% of<unk>  cases. * Asthma that affects the upper respiratory tract. Other causes such as cold air or chemicals breathed in can also induce coughing. * Gastroesophageal reflux disease (GERD), a common condition where the backflow of stomach acid between the throat and the stomach causes irritation, can lead to<unk> . * Infections such as pneumonia, flu, cold, tuberculosis or other infections in the upper respiratory tract often include coughing that can persist even after the infection has subsided.<unk>  is commonly mistaken as a symptom of the infection known as whooping cough. * Blood pressure drugs such as angiotensin-converting enzyme, which is commonly prescribed to individuals with high blood pressure and cardiac failure, are known to have a side effect of<unk> . *<unk>  bronchitis, an inflammation in the major airways such as the bronchial tubules, causes the coughing of coloured sputum. Most carriers of<unk>  bronchitis have a history of smoking.<unk>  bronchitis is on a spectrum of smoking-related lung disease also known as<unk>  obstructive pulmonary disease. Other lung diseases on the spectrum such as emphysema can co-exist with COPD. It accounts for 5% of<unk> . * Chemical irritants such as cigarette smoke or other irritants are a common factor that can lead to<unk> . These irritants typically contribute towards<unk>  bronchitis. * Other notable rare causes include aspiration, bronchiectasis, bronchiolitis, cystic fibrosis, laryngopharyngeal reflux, lung cancer, non-asthmatic eosinophilic bronchitis, sarcoidosis.
Chronic cough
Habit cough
Post-viral cough
Nasal congestion
Hajj Cough
Post-nasal drip
Hemoptysis
Allergies in children