I was dieing from COPD never having smoked in my life....turned out it was a jawbone cavitation[infection] from a root canal....there was no pain in that area....the tooth was on the lung acupuncture meridian.
thank god I had the jawbone cleaned out by a biological dentist....the smell while he was grinding , exposing infection pockets was terrible....the 'blood' in them is black....they basically grind til they see red blood.
Antibiotics do NOT cure a bone infection there is not enough blood flow.
my COPD ceased immediately....I have not had bronchitis in the 15 years since.
my regular dentist, tho he is a friend of mine and very good at regular dentistry, did not have a clue, and will not acknowledge what happened to this day.