Unlike dry cough, wet cough is productive since it is followed by expectoration of phlegm.
Thus, it allows clearing the bronchi to relieve the patient. Acute, it is usually due to a lung or bronchial infection (pneumonia, bronchitis, tuberculosis). Sinusitis can also cause a wet cough, by the descent of secretions in the bronchi. Chronic, it is linked to chronic bronchitis, dilation of the bronchi or mucoviscidos. .