Depends: Depends on the causes: pneumonia, sinusitis, bronchitis , allergy... You can cough all day or more at night. At night when you lie down, your airway tends to be more collapsed and narrow. You also don't clear your throat of drainage or mucus as much as during the day. For those reasons, your airway is more irritated at night making you cough more.
Answered 6/20/2017
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