Breathing ozone can trigger a variety of health problems including chest pain, coughing, throat irritation, and congestion. It can worsen bronchitis, emphysema, and asthma. Ground-level ozone also can reduce lung function and inflame the linings of the lungs. Repeated exposure may permanently scar lung tissue.

 

Health Effects

People with lung disease, children, older adults, and people who are active can be affected when ozone levels are unhealthy. Numerous scientific studies have linked ground-level ozone exposure to a variety of problems, including:

• airway irritation, coughing, and pain when taking a deep breath;
• wheezing and breathing difficulties during exercise or outdoor activities;
• inflammation, which is much like a sunburn on the skin; 
• aggravation of asthma and increased susceptibility to respiratory illnesses like pneumonia and bronchitis; and,
• permanent lung damage with repeated exposures. 

SOURCE: Environmental Protection Agency (EPA)