Inclusion Criteria:  age 18-80 years patients with chronic cough (cough that lasts 3 months or longer) consent with participation in the study  Exclusion Criteria:  patients using ACE inhibitors or Angiotensin II receptor blockers patients with head and neck cancer patients after radiotherapy in the head and neck area patients with airway or lung cancer patients with chronic lung disease except for bronchial asthma (COPD, interstitial lung disease, bronchiectasis, respiratory bronchiolitis) patients with chronic rhinosinusitis