post-viral cough – MySymptom

What Causes a Persistent Dry Cough That Lingers for Months After an Illness?

1. Introduction A persistent dry cough that lingers for months after an illness is typically caused by post-viral airway hyperresponsiveness and prolonged cellular inflammation. Even after the primary respiratory virus is eradicated, the epithelial lining of the respiratory tract remains damaged and exquisitely sensitive to minor environmental stimuli. This ongoing sensory nerve irritation triggers a … Read more

How long does a persistent dry cough last after a common cold clears up?

1. Introduction A persistent dry cough following the resolution of a common viral upper respiratory infection typically lasts between three to eight weeks. This prolonged duration is not indicative of an ongoing active infection, but rather a reflection of temporary airway hyperresponsiveness and extensive desquamation (shedding) of the protective epithelial lining of the respiratory tract. … Read more