When the air quality is low I feel a tightness in my chest - I had this checked out about 2 years ago.  NOT a heart condition. - yet the problem has not gone away - Age 49 - weight 220.  Family history has diabetes, hypertension and heart dieease.  I do not drink or smoke and I amnot taking any meds.
Thanks for your question on Chat Doctor. I can understand your concern. In my opinion, you are mostly having post inhalation bronchitis. As you are saying that you feel chest tightness after inhaling polluted air, possibility of bronchitis is more. Polluted air when inhaled can cause irritation and inflammation in airways (bronchitis). This will cause bronchospasm and this intern causes chest pressure and tightness. So the best treatment for you is to wear face mask all the time. Inhaled bronchodilator like formoterol or albuterol are also useful to relieve chest tightness. Don't worry, you will be alright. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.