Post-infectious cough affects up to a quarter of adults after a respiratory infection and can last up to 8 weeks. It occurs because the previous infection triggers an inflammatory cascade that increases bronchial sensitivity and mucus production, while reducing its elimination.
Red flags such as problems swallowing, excessive breathing and coughing up blood may need to be investigated. If it lasts more than 8 weeks, you should definitely consult, because it is very unlikely that it is a post- Infectious cough, says Alejandro Videla.