Passive smoking can cause a range of respiratory problems, including coughing, wheezing, and shortness of breath. Nonsmokers exposed to secondhand smoke are at an increased risk of developing asthma and exacerbating existing respiratory conditions such as bronchitis and pneumonia. Passive smoking can exacerbate allergies and sinus problems in nonsmokers. The irritants and pollutants present in secondhand smoke can trigger allergic reactions, sinus congestion, and inflammation, leading to discomfort and respiratory distress.
