The prevalence of<unk>  in many communities in Europe and the U.S. is 9–33% of the population.<unk>  is three times more common in those who smoke compared to people who never smoke. Data analysis shows that exposure to tobacco smoke in a home environment is a risk factor for children due to secondhand smoke inhalation. Other causes of<unk>  include higher particulate matter concentrations in air, related to increase cough and sore throat in children. An increase in nitrogen dioxide has also shown a rising association with<unk>  syndrome.
Chronic cough
Habit cough
Post-viral cough
Nasal congestion
Hajj Cough
Post-nasal drip
Hemoptysis
Allergies in children